Upgrade rails to 4.0.2.

This fixes numerous security issues. See
http://weblog.rubyonrails.org/2013/12/3/Rails_3_2_16_and_4_0_2_have_been
_released/ for more info.
Silence deprecation for enforce_available_locales
Fix story drag and drop reordering.

This should fix #196.
Update jasmine specs.
Remove i18n-js gem.
Merge pull request #212 from kaleworsley/remove_i18n_js

Remove i18n-js gem
Merge remote-tracking branch 'origin/master'