Fix emails being sent with the wrong mail address, fix #713

All emails have to be sent with the email configured in the Site. Spams
and feedbacks were being sent with the email of the user that created the
spam/feedback. This fails for some SMTP servers and is wrong.
refs #668
Created logic to check if the current user have the permission to record the meeting
(looks for the string "DOCENTE" in ufrgsVinculo)
refs 668
Fixed logic when user does not have a shib token
Add .ruby-version
Merge branch 'master' into recordings
Rooms' 'meetingid' are now fixed and globally unique

Update made in bigbluebutton_rails, see #734 and #735.
Merge remote-tracking branch 'upstream/issue668' into recordings
Fix indentation if recording_start_links view, refs #668
Set record false with 'update_attribute', refs #668

It's more guaranteed to update the attr 'record' than using
'update_attributes', that can fail during validation.