Blockly status

@BrettASwift @AmbientOSX This PR has execution tracing for the forward, left, and right blocks: highlighting in the window and display in the lower right corner of the HUD. 

This is to get something in for today, things I will continue:
- ~~Draw blocks in hud from svg references, instead of static images~~ This is a bit trickier than I had hoped. Putting off for now.
- While block inclusion

Uses virtual-world-framework/vwf#273