Merge pull request #295 from virtual-world-framework/Ken-Art

Ken McClure:  Update to scene.dae.  Smoothed out the main terrain space ...
Prevent referencing non-existent tiles
Fixing the grid and fixing the sensor.

Conflicts:
	source/scenario/scenario2f.vwf.yaml
	source/scenario/scenario3a.vwf.yaml
Fixed battery values and added some VO
Added scenarios and some more blockly functionality.

Conflicts:
	source/scenario/scenario3b.vwf.yaml
Reverting some changes
A bit more VO.
And more VO...

Conflicts:
	source/marsGameSound.vwf.yaml
Scaffolding updates for Scenarios 2 and 3.
Minor fixes - added in loop blocks for level 3 scenarios
Fixes some trigger naming issues.
Fixes some PR comments and some earlier scenario bugs. Also fixes some issues with sensors/track anomalies failing to reset.
Start at 1a again...
Merge pull request #296 from virtual-world-framework/fix-grid

fix-grid
Fixes issue with sensor reset declaration.
A bit of code cleanup.
Merge pull request #293 from virtual-world-framework/scaffolding-fixes

New VO + All Levels Scaffolded
Ken McClure: update to crater placement.
Ken McClure: update to image size.  cut it in half and alleviated 3mb's.
Ken McClure: update to scene.dae.