index on extrudePolygon: 86ce69c Added doc for removeDuplicates
On extrudePolygon: extrudepoly
initial implementation
fix polygons with cut-outs
Merge branch 'batching' into extrudePolygon
correct computation of attributes for walls
documentation and tests
updated cesiumviewer example
Merge branch 'batching' into extrudePolygon
Merge branch 'batching' into extrudePolygon

Conflicts:
	Apps/CesiumViewer/CesiumViewer.js
	Source/Core/PolygonGeometry.js
Merge branch 'batching' into extrudePolygon

Conflicts:
	Apps/CesiumViewer/CesiumViewer.js
Merge branch 'batching' into extrudePolygon
check if undefined
fix indices, texture coordinates
reindex
Merge branch 'batching' into extrudePolygon

Conflicts:
	Apps/CesiumViewer/CesiumViewer.js
wall subdivide
Merge branch 'batching' into extrudePolygon

Conflicts:
	Apps/CesiumViewer/CesiumViewer.js
Merge branch 'batching' into extrudePolygon

Conflicts:
	Apps/CesiumViewer/CesiumViewer.js
fix bounding sphere