Refactored scenario

Conflicts:
	source/hudInstructions.js
Set and reset scenario
Fixed property reference
Fixed drop behavior & set inventory in scenario
Remove old reload function
Fix bug with multiple success calls
Merge pull request #92 from virtual-world-framework/switch-scenario

Switch scenario
Moves blockyUI to center and removes it while executing program
Make blockly interface draggable
Leave blockly interface up while running
Add ram bar to blockly UI
Adjust ram bar length and rename ram variables
Leave blockly UI hidden at startup