Fixed success check for scenario 2
Hide blockly UI when run is pressed
Merge pull request #159 from virtual-world-framework/fix-scenario2-success

Fixed success check for scenario 2
Always draw the line when the graph tab is open
Merge pull request #160 from virtual-world-framework/close-blockly-onrun

Hide blockly UI when run is pressed
Merge pull request #162 from virtual-world-framework/line-draw-change

Always draw the line when the graph tab is open
Change incomplete program trigger conditions
Adds a sceneBlackboard to write to and limits VO to only play once using reading/writing from that blackboard.
Merge pull request #163 from virtual-world-framework/blackboard-for-triggers

Merge #163
Merge pull request #164 from virtual-world-framework/failure-message

Change incomplete program trigger conditions
Ken McClure:  Update to scene.dae.  removed rover tracks from scene file.  Adding in separated models for curved and straight rover tracks.
Added roverTracks node to environment
Ken McClure:  Update to straight rover tracks
Aligned tracks with graph line.