Update JSON, Devise and Rails versions (+ fix badge bug)
Fixed og:image url for facebook shares
name the expected branch for non-open source contents as "closed source"
The whole about text is now shown in infos page and fb meta tag.
A template for sending emails to all the tribe admins.

Currently the email text is hard-coded in the template, in the future
should create a web UI for sending the emails.
Update deploy rake task
update deploy script
Fixed a bug in sending community starter emails.
Minor fixes to community starter emails.
Fixed community starter email auth links.
Merge branch 'develop' into categories