Adds in homebrewed and tooltipable repeat block.
Merge pull request #217 from virtual-world-framework/new-repeat-block

Tooltipable repeat block
Add graphical tooltips to app defined blocks
Change tooltip removal to be on document mousemove
Add placeholder tooltip images and fix tooltip remove event listener
Add tooltips to new graph blocks
Remove dimensions from tooltip def and generate tooltip html content dynamically
Add placeholder tooltip for while block
Merge pull request #216 from virtual-world-framework/tooltips

Tooltips
Added gridObstacle component
Added rotation logic
Added obstacle components
Added new rubble crater obstacles.
Made crash pod a gridObstacle
Add editor application
Start adding grid tiles to editor
Start working on user interface for editor
Improve interface and hard code lists
Added hover effect on list items
Fixed grid world calculations