Blockly redesign

This isn't ready for merge, just feedback. Looking for feedback on the colors/lack of color, opacity, size, usability, et cetera of the blockly UI. I am probably aware the bugs you will see with this PR, but let me know anyway, just briefly. I'm mostly trying to get feedback on the visuals and functionality so I can make tweaks.

@kadst43 @eric79 @AmbientOSX 

- First pass at Blockly UI redesign
- Modified Turn block text
- Modified repeat block subtitle text
- Commented out in-HUD blockly trace

TODO:
- Add blockly info text (small bar between RAM/Start and blockly window) to let users know what is preventing their program from running, among other things.
- Fix loop counter in Blockly UI
- Add feature to "dock" UI to right side of screen, hiding all but the running program and start/reset button
- Hide blockly at start of certain scenarios