Added command line flag for restricting the fix-versions. The actual restriction is not yet implemented.
Merge branch 'master' into fix-version-restriction

* master:
  Tidy up.
  Change package name to remove references to foxopen. This project has nothing to do with FOXopen other than that I use FOXopen in my day job. Most of the work I do on the JIRAChangelogBuilder project is done in my spare time.
Implementation of --version-starts-with and --version-less-than-or-equal
flags to further restrict which version are included in the changeling.
See README.md for full instructions on use.