Remove capistrano, can still be used at mconf/mconf-web-caphub

Deploy with capistrano is now made using caphub, see
https://github.com/mconf/mconf-web-caphub
Remove old installation scripts, refs #638

They are not used anymore, installation now only via wiki or capistrano, see
https://github.com/mconf/mconf-web/wiki/Mconf-Web-Deployment
Fix failing tests for Notifier
Update ruby-openid to fix seg fault when running test, refs #855

We are not really using openid anymore, but there are references to it in the
application, so it's better to keep the gem installed for now.
Tests for Notifier to always use 'en', complements bf5b13b20d

In some machines the tests were passing and in others they were failing
when trying to compare a string in 'en' with a string in 'pt-br'. Now we
set the language to be always 'en' when testing.
Change bbb room name when user changes login, with tests and fixes #837
Added translations to user roles in space fixes #821
Add 'en' translations to user roles in space, refs #821
Developed a new way to utilize an "url params" to redirect the user to the previous page after a login.
fixes #814
Remodeling the invite page of a space room.
Done the remodeling the invite page of a space room.
New permission tests for join a room. fixes #789
Update mconf.yml
Update mconf.yml
Redirect from a room's #invite_userid to #invite when needed, refs #789

Eenamed CustomBigbluebuttonRooms#identification_webconf to
CustomBigbluebuttonRooms#invite_userid to make it clear that this route is
associated with #invite.
And refactored the tests a bit.
Better selection of mobile/desktop in the invite view, refs #789

More information about each option and making it easier to select.
Also included information on how to download Mconf-Mobile.
Small adjustments in the buttons in the invite view, refs #789
Update how layouts are set in CustomBigbluebuttonRoomsController, refs #789

Setting with multiple `layout` calls wasn't working as expected.
Add information about Mconf-Mobile in the join_mobile view, refs #807

Similar to the information added to the invite view.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	app/views/layouts/_global.html.erb
	config/locales/en/mconf.yml
	config/locales/pt-br/mconf.yml