Simplifying servers/index, refs #802

Show servers in a simpler table, with less information and
easier to see everything.
Use lodash v1.3.1 in the client
Finishing refactoring all views for servers, refs #802

Need now to update the views for rooms and recordings to follow the same model.
Fix selection of items in a space's menu

Was broken after ece7b8b9254d9.
Finish refactoring all views for rooms, refs #802

Following the same model used for servers.
Started using handlebars_assets for js templating in the client.
Update locales for BigbluebuttonRails
Finish refactoring all views for recordings, refs #802

Issue #802 is mostly finished now. Just needs some reviewing
and polishing.
Move a shared webconf view to views/shared
Set and review permissions for all webconf controllers, refs #804

Specially for recordings, that were not being authorized at all.
Move webconf methods from UsersContrlr to WebconferencesContrlr

UsersController had a method `edit_bbb_room`. Moved to WebconferencesController,
where all "additional" methods for webconference rooms will be.
Still refactoring it, some things are still not 100%.
Fix WebconferencesController#space_show's view and css

Method changed named but the view was still with the old name
Also fixed the layouts set in this controller and added more tests.
Restrict the params of a room that a normal user can set

Updated BigbluebuttonRails to a branch that uses strong_parameters to restrict
access to parameters of rooms.
The tests are implemented but commented because we need rspec 2.14 for them
to work.
Fix the color of the caret in the navbar
Fix test errors after cdf5ed1899 and remove more useless images
Remove all references to agendas and calendars :tada:

Events had agendas and calendars, but they have not been used for a long time.
Cleanup on events, removing useless stuff

Removed a lot of methods and attributes that are not used anymore. Still not
100%, more things can be removed.
Removing more views and methods that are not used anymore

Mostly views in app/views/shared and and methods from helpers.
Visual improvements on actions over conference rooms

Specially in the user's home, the options are not in a dropdown button instead
of individual links.
Options to invite other people and join from mobile changed as well: bigger
buttons, inputs with the proper cursor and others.
Add recording options to user's rooms, refs #804

First version where the user can set his room to record and set the title and
description for the recording. Still only for user rooms.

Added also a new js component "edit in place", that allows inputs to be easily
submitted via ajax to update a model. This can possibly be used in the future
to make other forms more responsive and easier to be edited.
Refactoring of logos. Changed the call methods to accept the new upload version of logos.