Adds some sample xml files to load for the toolbox
Renames the default toolbox
Allows the scenario to change the toolbox
Adds a button for each blockly object
Removes duplicate check for the div
Merge pull request #89 from virtual-world-framework/blockly-buttons

Blockly buttons
Merge pull request #88 from virtual-world-framework/blockly-scenario

Blockly scenario
Updated HUD elements
Wait for HUD to be initialized
Added camera images
Initialize active camera icon
Added rover selection glow
Fix visibility/pointer event handling