bump acts-as-taggable-on
Merge pull request #4978 from jhass/bump_acts_as_taggable_on

Bump acts-as-taggable-on
i18n.js: Add interface to retrieve entire sections

And make use of that in HelpView
remove unused variable in i18n.js [ci skip]
Home page, registration page and robots.txt personnalization
Add my aspects link in the header
Add indication about testaccount and framasphere on the home page
Add new registration terms