Merge pull request #21 from charvel/master

Adding Localization/Translation option
Localization: Clean up comments and change default to US

Also changed install.php to use local assets. This makes the install
more reliable without sacrificing anything since installation is a one
time thing.
Merge pull request #22 from charvel/master

Updated messages.mo
Localization: Migrate older configuration files for language setting
Localization: Add en_US
Localization: Fix incorrect compiled file for en_US (was fr_FR)
Merge remote-tracking branch 'upstream/master'