Support multiple conditions together with a JS file per locale.
~ Add back missing doc about config file
[ci skip]
Merge pull request #207 from codeholic/fix_segments_per_locale_for_v3

Support multiple conditions together with a JS file per locale.
* Change development dependencies `rspec` (locked at `3.*`)
! Fix spec
* Test against MRI 2.1.2 on Travis
Update README and CHANGELOG
Merge remote-tracking branch 'remotes/origin/master' into avail-locales
Fix conflicted spec from recent merge
Merge remote-tracking branch 'remotes/origin/master' into Branch_d9edbeb87a31fad5ce1891d1da1170fc00766f58

Conflicts:
	lib/i18n/js.rb
Merge remote-tracking branch 'remotes/shields/no-conflict'
Merge remote-tracking branch 'remotes/shields/avail-locales'