Switch to minified version of dojo 1.9.

Delete uncompressed and dojox files.
Remove references to dojox
Merge pull request #865 from AnalyticalGraphicsInc/upgrade-to-minified-dojo

Switch to minified version of dojo 1.9.
Remove scratch bounding sphere for 2D that made the last computed bounding sphere the same for all polylines.
Use a scratch bounding sphere per polyline.
Merge pull request #868 from AnalyticalGraphicsInc/disappearing2DPolylines

Fix polylines disapperaing in 2D.
Fixes #813