EditorPane: Remove unused variables.
EditorPane: Create realtime string if not exist.
AppController: Added removePaneFromTabView method.
Collaboration: Renamed method name.
Collaboration: Fixed creating initial snapshot objects.

They were missing context.
Collaboration: Fixed paneHash in createPaneFromChange.
Collaboration: Clear snapshot data before ending the session.
Collaboration: Improved resurrectSnapshot to handle initial panes after collaboration started.
Collaboration: Don't resurrect snapshot if the session is just started.
Collaboration: Rename property name,
Collaboration: Apply host snapshot if participant is watching the host.
Collaboration: Code refactor.
Merge pull request #122 from koding/pane-states

Collaboration: Apply host snapshot if participant is watching the host.