Merge pull request #297 from virtual-world-framework/Ken-Art

Ken McClure: update to crater placement.
Rebase and propagation.
Merge pull request #298 from virtual-world-framework/dont-clear-blockly

Don't clear blockly between scenarios (except major breaks).
Add pause menu HTML
Added menu button css
Start adding in menu functionality
Clear blinking & refactor camera mode switching
Added back tileVisible property
Changes the graph number block to a dropdown.
Fixed a debug artifact.
Fixed some block tooltip issues.
Added passable tile by turbine
Modify startup order
Merge pull request #302 from virtual-world-framework/pause-menu

Pause menu
Merge pull request #301 from virtual-world-framework/graph-num-block

Graph Number Block Dropdown
Display tabs explicitly

Conflicts:
	index.vwf.yaml
	source/index.js
Added new way to load blockly toolboxes
Set scene toolbox if activeNode toolbox is changed
Clear blockly tabs between scenarios
Clear blockly tabs between scenarios