Add WebRTC JavaScript Libs and VideoChat Area
Added TabContainer.
Started refactoring Whiteboard.js for multiple usage.
Added User entity and Workspace controller.
Separate whiteboard.jsp to workspace.jsp and room.jsp
Refactoring whiteboard.js
Add Login page.
Added MultiTabs: Create New, Joint Exists.
Fixed and tested Whiteboard sync.
Refactored the Call for MultiTabs.
Some fixes.
Fixed Draw tools after Refactoring
Added persisting Workspace and Rooms with Worksheets.
Finished the second refactoring: Multiple Worksheets in the same Room.
Fixed FF support.
Some Fixes.