Merged r10840 from trunk.
Adds copyright.
Symbols can not be sorted with ruby1.8.
Adds english names for several languages.
Cache languages names to avoid loading all translations files.
Adds a custom i18n backend that lazily loads translations files.
Code cleanup.
Eager-load authors.
Pins mysql gem to ~> 2.8.1.
Removed unused i18n string (#8373).
