More Small Changes

The top 6 paintings from the Gallery of the Week, appear in the main game around the GotW portal.
Added a "controls" page to the pause menu describing all the keyboard controls.
The 0-6 keys can now be used to toggle through all the colors (see controls page)
Added UI pieces to indicate the currently selected color when using the Brush or Paint Bucket tool.
Made the server faster again to handle the 651,218 paintings submitted so far.