Burn it, burn it all!

Clear the way for a rewrite using extjs 4.
Move the images around.
Initial commit of a new extjs 4.2.1 application.
Create the initial view.
Add some utility classes for sending JSON RPC requests to XBMC.
Start implementing the movies section.
Copy some additional files to the build directory.
Update README.md
Clean up the view namespace.
Use a drag and drop grid for selecting genres.
Add mercury theme.
https://market.sencha.com/extensions/mercury-theme-extjs-4-2-architect-3
A couple of ui tweaks.
Revert "Add mercury theme."

This reverts commit f3ae81591f49bc12e7f89c929f10c7f8e791f861.
The theme isn't complete, so some of it looks very ugly/unusable.
Replace media flag images with ones from the Aeon-Nox theme.
Add movie images and stream detail icons to details view.
Resize place holder images.
Bring into line with XBMC add-on standards.

http://wiki.xbmc.org/index.php?title=Add-on_structure
Add split string list utility function
Add helper function to  get list of genres from genre select grid
Fix typo.