Use gulp shell instead of nested cbs with gulp-git
Split bump and git commits/tag into separate tasks
Properly quote git commit message arg
Write bumped files back out
Merge branch 'fix-release'

* fix-release:
  Write bumped files back out
  Properly quote git commit message arg
  Split bump and git commits/tag into separate tasks
  Use gulp shell instead of nested cbs with gulp-git

Ref #25
Release v0.3.2