Change log for PiFlash

0.0.3 2018-10-11T16:47:42-07:00 America/Los_Angeles
 - update installation instructions to reflect piflash's move on GitHub
   from ikluft-tools to new piflash repo
 - add CONTRIBUTING.md for instructions on contributing to the project

0.0.2 2018-10-11T13:18:36-07:00 America/Los_Angeles
 - split 1000+ line piflash script into modules: PiFlash, PiFlash::Command,
   PiFlash::Inspector, PiFlash::State
 - add test directory and basic tests
 - add build/PiFlash.spec for building RPM packages - piflash script uses
   the modules, user doesn't need to know Perl

0.0.1 March 2017
 - release piflash script with "Using Perl on the Raspberry Pi" article by
   Ian Kluft on OpenSource.com