Merge pull request #289 from daronco/html5-bridge-layout-setup

HTML5 layout with bootstrap
HTML5: restructuring the client's html

Removing all the styling from the javascript files, it should all be done
in the css. Not finished yet, the chat and login screens still need a lot
of work.
Last-ditch fix for missing presentation images

We can only get here if all of the files for the presentation are
*completely* missing. One thing that can cause this is if the
presentation filename starts with a '.' character - the presentation
files aren't correctly archived then.
Merge pull request #290 from kepstin/presentation-missing-slide

Last-ditch fix for missing presentation images
created a new locale string for the chat module
HTML5: remaking the html markup for the chat

A lot of changes to make it easier to control the design from the css.
The actions in the chat now only add or remove classes from the elements instead
of changing their css, so the css is responsible for showing or hiding them
and controlling how they appear in the screen.
HTML5: pushing layout changes from @tylercopeland
Merge pull request #291 from SenecaCDOT-BigBlueButton/add-another-string

created a new locale string for the chat module
HTML5: cleanup session whiteboard view, remove whiteboard controls

Removed the controls that are not used anymore, are gonna be used only when
the html5 is allowed to be a presenter.
Merge pull request #292 from daronco/html5-bridge-layout-setup

HTML5 new HTML markup and design
HTML5: splitting the css files in several sections

So we can work on them in paralell to implement the new layout.
HTML5: showing/hiding elements when navbar buttons are clicked
Users list style updates
HTML5: impemeting the layout positioning for mobile devices
Public chat style updates
HTML: layout with fullsize components when in very small screens

For mobile phones on portrait mode, chat, user list and video are shown
taking the whole screen.
HTML5: remove all old css files and adjust what's left
Merge pull request #293 from daronco/html5-bridge-new-layout

HTML5 new layout, first version
 - add more logging
minor bug fix in old stress testing script