chore(package.json): re-introduce version into package.json (going to use grunt-bump so...)
chore(Gruntfile): change 'bump' logic
chore(Gruntfile): add 'release' grunt task

'release' performs a 'bump' (w/o commit), then performs separately
a 'build', 'dist', 'commit', 'tag'.
chore(release): v0.2.1