flat airspace
attributes
extrude airspace
refactor WIP
interchangeable corners
rounded/beveled corners
Merge branch 'master' into airspace
rounded ends
extrusion
Merge branch 'master' into airspace

Conflicts:
	Source/Core/WallGeometry.js
correct wall attributes
Merge branch 'master' into airspace
handle co-linear positions
subdivide
corrected st
reverse
rename
Fix test due to bug fix in Chrome.
Check for stencil is OK since it is false
refactor WIP