Clears Blockly appropriately during scenario1
Merge pull request #282 from virtual-world-framework/clear-blockly-again

Clears Blockly appropriately during scenario1
Remove lerp when camera follows target
Reduced GC in grid.js
Reduce GC in camera.js
Eliminate HUD texture recreation per frame
Reduced GC in HUD.pick and event handling
Finished HUD.js cleanup
Remove character image setInterval
Removed arrays loopCounts and counts
Finished hudInstructions.js optimization

Conflicts:
	source/hudInstructions.js
Fixed HUD element draw order
Limit terrain translations to no more than once per render
Removed old comment
Keep smooth transition on switch target
Start index.js cleanup
Ensure that the rover stops in the right place
Hide blockly immediately