Try to fix html5lib dependency issues

bleach requires html5lib==0.9.5.  django-cms isn't picky about
the html5lib version.  Try putting bleach first in the requirements
file so a version of html5lib that works for both bleach and
django-cms is installed.

Addresses #894
Fix typo in story translation html cleaner

The summary was accidently getting assigned to the call to action.

Addresses #894
Merge branch 'master' into develop
Merge branch 'develop' into 579-rework_workflow_steps