re-enable lang chooser in dev mode, enable farsi

- use new "changeLang" interaction for expedience
- add some hardcoded dir="ltr" attributes to fix some layout issues when an
  rtl lang is selected. more dir attributes may need to be changed once we
  start working with translators.
Merge git://github.com/carolyna/lantern-ui

* git://github.com/carolyna/lantern-ui:
  last few single quote typo corrections
  removed stray single quotes
  Added Persian translation
add some missing i18n to footer
version bump to 0.0.9
smaller splash image
vendor compass_twitter_bootstrap, ruby 1.8 compat

also make dev mode langchooser translucent