0.62 - finished group->add_file_params support: added test, fixed uncovered bugs
     - removed some debug code from checksum test

0.61 - added initial checksum support
     - handles in and out files
	 - delete and rename still to come
	 - need to add tests to ensure that relative and absolute files are
	   resolved smoothly
	 - copy files structure to internal _use_files structure
	   - turn pathnames into HPCI::File objects
	   - clean up all the alternative structure layout options
	 - squashed a Heisenbug in t/20-skipstage.t

0.60 - added HPCI::File class for managing file info
     - reworked stage->files attribute to use file class info
	 - added storage_class and storage_classes to group and stage to select
	   class for files
	 - added ENV HPCI_LOG_NO_STDOUT and HPCI_LOG_NO_FILE to suppress logging
	   to stdout or to the log file

0.59 - added test for the various files attributes (skipstage, delete, rename)
     - fixed some bugs in the handling of skipstage and rename

0.58 - made HPCI::ScriptSource always be included - doesn't hurt if not used
         and it allows users to explicitly add wrapping to their stage
         execution scripts
     - changed logic around out file testing to add a separate acceptance
         method, so that special copying actions can be handled after validity
         checking has finished

0.57 - removed duplicate code for timestamp testing, fixed retain copy
     - partial support for post stage actions in generated script

0.56 - finished adding rename to files attribute handling

0.55 - check in->req files
     - added skipstage files attribute, and use it to allow skipping stage
         execution
     - added delete and rename files attribute, applied after stage succeeds
     - coded the file actions (exists, timestamp, delete, rename) with names
         that identified where they are being done, allowing drivers to
         over-ride the actions in different ways in different contexts

0.54 - added group optional attributes - connect, login, password - to be
       available for clusters that require accessing with a network connection
       or require authorization.

0.53 - added file_system_delay attribute to allow shared file system to have a
       delay before a change made on another node is sure to be visible
     - use this delay when checking that required output files have been
       update

0.52 - script file was being generated before all of the stage roles had been
       loaded
     - fixed some tests

0.51 - Added code attribute to stage as atternative to command
     - fixed creation of script_file to not occur until it is requested
         - would fail if anyone was using the command creation methods to
           build the command after the stage was created
         - was creating the script_file even if code was provided instead of
           command

0.50 - Documentation for regexp add_deps
     - fixed some add_dep -> add_deps typos

0.49 - Added regex support for add_deps method
     - Added documentation for log_no_stdout/log_no_stderr from 0.48

0.48 - Added log_no_stdout and log_no_file attributes to suppress writing
       the log either to stdout or to a file.  The default is to continue
       writing both.
     - Fixed a message that was going explicitly to stdout instend of being
       logged.
     - Removed a test from t/19-env_key.t which would break if the BoutrosLab
       local config is being used. That config setting is a reasonable one
       for other locations to set (making max_concurrent have a non-zero
       default), so the test is no worth keeping around.

0.47 - Improved docs for verify_completion_state
       - added state argument to verify_completion_state callback
       - allows callback to only test when the run passed or failed
       - clarified that undef return would leave state unchanged
     - Added env_keys list of named keys, and env_key_specific hashes of
       attributes.  The env_key_specific contains hashes of attribute values
       to be merged into the new object attribute list (like cluster_specific)
       if the key is in the env_keys list.

0.46 - SystemLogger - moved the commentary from STDERR to log
     - changed log status of some messages from info to warn/debug
     - converted some STDERR messages to use log
     - added some missing build_requires for testing

0.45 - SystemLogger - moved the commentary from STDERR to log
     - added files attribute to Stage
     - added checking files attribute to ensure that required output files
       were generated before accepting a stage as passed

0.44 - SystemLogger was not in MANIFEST
     - added .perlcriticrc to quiet BoutrosLab local settings

0.43 - added SystemLogger.pm module
       - not used by default
       - available by request (esp. by LocalConfig)
       - logs return status in a global location
         - can be used to check for recurring problems like failing node
           hardware
       - initialization of default_attributes was broken

0.42 - added verify_completion_state callback to allow user code to decide
       whether a stage finished successfully, should be retried, or failed
       independently of the stage's exit status
     - added final_job_state to stats to record pass/fail/retry decision
     - removed modules_to_load from tests - they are BoutrosLab specific
     - renamed t/01-templating-role.t to t/01-templating_role.t for consistency
     - fixed a test title
     - added test for forced_retries and fixed it (was broken)
     - removed unused line of code from ScriptSource - would fail if local
       config did not invoke HPCI::ModuleLoad

0.41 - made stage_dir the normal name for the stage creation attribute
     - added stage_dir_name to have the created stage_dir be created under
     group_dir

0.40 - rearranged retry logic
       - added should_choose_retry and choose_retries attributes
         - allows user-provided function to decide whether a retry
           should be attempted after a stage fails (with a limit to
           the maximum number of retries, default 1)

0.39 - Doc updates

0.38 - cleanup of HPCI.pm pod
     - minor typo bugfixes noticed in pod cleanup, no-body had actually
       tripped over them yet

0.37 - add force_retries attribute to stage objects to force a specified
         number of retries before deciding that a stage has really failed
     - some cleanup of pod, more yet to come

0.36 - tighten timeout processing to reduce critical section holes
     - protect against $? being over-written
     - added 'stage_defaults' attribute to group - a hash that will be used as
         attributes for every stage that gets created
     - added 'cluster_specific' attribute to both group and stage creation
         - a hash indexed by cluster type
             - if there is an entry for the actual cluster type
                 - that subhash will be used as attributes
             - other non-matching cluster types will be ignored
         - allows same code to be used for multipe cluster types more easily
     - added a default_attrs hash to HPCI for config over-rides to use

0.35 - added HPCI::LocalConfig support code to allow local configuration
     - cleaned up module dependencies, removed some use statements that are no
     longer used
     - refactored _register_status and _collect_job_stats to support drmaa in
     SGE
     - cleaner (non-Dumper) output for stage status
     - added required modules to Build.PL

0.34 - made dump of job status info more readble

0.33 -
     - use 'method' instead of 'sub' in parameterized roles - the doc says
         that this is required, although it seemed to be working before
     - added support for abort for cases when the driver can identify a
         situation in which the job was not attempted to be run
     - added direct support for kill, killsignal rather than leaving them
         tangled in exit_status and subject to local interpretation
     - rearranged a number of methods and modifiers so that they could be
         overridden in drivers smoothly
     - removed default from HPCI::ModuleLoad, made it an empty array that can
         be loaded by a config wrapper module
     - added support for extra roles to be provided for local environments
         and/or specific cluster types.  (e.g. ModuleLoad might be selected
         for labs that use it for all cluster types)
     - added ScriptSource extra role to allow a local environment to request
         adding a line at the beginning of the generated script for each run
         to source necessary config stuff
         It defaults to an empty array that can be provided by a config
         wrapper module
     - reordered stuff relating to running, needed to provide alternate
         control for different run styles in drivers (in particular, using DRMAA
         to manage SGE)
0.32 - major cleanup of existing tests
     - more tests added
     - bug fixes
       - mkdir initialization handling
       - timeout termination handling
       - failure handling choices all work (skip_deps, skip_all, ignore)
     - enhancements
       - made dep/deps and pre_req/pre_reqs be synonyms for add_deps method
         - both accept a scalar or list
       - added ChangeLog and README

0.31 - initial CPAN release
0.30 - separate SGE into an independent module preparing for CPAN release
0.01 .. 0.25 - BoutrosLab internal releases