group name should be unique for a given author

Fixes #50
use consistent quote style
change privacy_level to an integer
remove extra blank line
add english and french translations
add the enumerize gem
Merge remote-tracking branch 'upstream/master'
add enumerize and update code. validate presence of name
use enumerize
Merge pull request #51 from acmetech/master

Add the enumerize gem and group name unique by author