Refactor and improve comments for custom captcha classes
Rename custom captcha classes to indicate that they are patched versions
Merge pull request #7 from zanata/damason-refactor-captcha

Refactor and improve comments for custom captcha classes
Merge branch 'master' into rhbz978656
Work in progress, editor filtering for reviewed translation: https://bugzilla.redhat.com/show_bug.cgi?id=978656