Advanced options added (auto_start <video, audio>) and tested.

#refs 1204
Problem with Space.stub!
Advanced Options added and tested.

#refs 1204
Shibboleth Always new account flag added.

#refs 1284
A few more variables in the css files, easier to customize

Pulled from work at mconf-ufrgs/mconf-web@master
Improve redirects after login

Solution based on:
https://github.com/plataformatec/devise/wiki/How-To:-Redirect-back-to-current-page-after-sign-in,-sign-out,-sign-up,-update

refs #867
Redirect back properly after signing in via shibboleth

It stores the latest "valid" page before a login via shibboleth and returns
to if after the login.

refs #862
Option to force shibboleth to always create a new account added.

#refs 1284
Option to force shibboleth to always create a new account added and tested.

#refs 1284
More tests were made to ensure the correct redirects after a user log in.

refs #1231
A few more variables in the css files, easier to customize

Pulled from work at mconf-ufrgs/mconf-web@master
Merge pull request #27 from gmiotto/branch-v2-1204-advanced-options

refs #1204
Update bigbluebutton_rails after PR #27

refs #1204
Update strings for advanced options in meetings, after PR #27

refs #1204
Merge branch 'branch-v2-1284-shibboleth-always-new-account' of git://github.com/gmiotto/mconf-web into gmiotto-branch-v2-1284-shibboleth-always-new-account

Conflicts:
	db/schema.rb
Review of feature shib_always_new_account, PR #28

Biggest changes in the tests for ShibbolethController. All the rest is just
a general review.

refs 1284
Merge pull request #28 from gmiotto/branch-v2-1284-shibboleth-always-new-account

refs #1284
Improving the tests for mailers

Following the changes made in 29fa170a24e061.
Also included ":host => Site.current.domain" when getting URLs in mail
views.

refs #371
Add tests for the worker Invitations

refs #371, refs #790
Merge remote-tracking branch 'origin/branch-v2' into branch-v2-refactor-emails

Conflicts:
	db/schema.rb