Ini check rule interface

Ini check rule interface + minimal behavior.
Merge remote-tracking branch 'origin/master' into ini_check

Conflicts:
	app/controllers/translators_controller.rb
Ini rule gate case added

Checks if Ini rule and ini option are both set. If not raises alert.
Ini check functionality

Ini option validation added to default file uploader.
Ini check interface update + bug fix

Ini dropzone file container now does not accept new files unless
you remove existing file from it.
Bug fixed with auto-language selector.
Merge pull request #28 from jonastinkle/ini_check

Ini check