Ken McClure: Update to rock_2x3.dae Brett asked that I rotate it to match the others.
Ken McClure: adding two new place-able objects that brett mentioned having.  I added in the rubble pieces to the crater.
Ken McClure: adding new blank version of terrain.
Ken McClure: Update to intro screen image.  Completed full rendered imagery for screen.
Merge pull request #214 from virtual-world-framework/Ken-Art

Ken art
Add div around blockly ui to allow scrolling
Make blockly ui accessible for shorter screens
Resize the blockly ui on window resize
Fix resize on blockly drag and factor out hard coded heights
Make blockly interface resizable and fix onload auto resize
Keep blockly window on screen on resize
Keep blockly within bounds on resize of itself