Changes for version 1.02
- Invoke new as a class method in docs and practice.
- Add support for COW PVs when returning key values. This will hopefully deduplicate returned strings where possible.
- Adjust tests to skip exists tests on 5.8.1, not 5.6.2
- Optimize cdb_hashadd as a inline macro
- Croak if atomic re-write from the temp to the final file fails.
- CDB_File - Perl extension for access to cdb databases