initial sphere geo
Merge branch 'batching' into sphereGeometry
Added controls to Sandcastle "Sensors" example

The controls allow the location and orientation of the sensor to be varied.
Updated sandcastle "Sensors" defaults

The default view and orientation is close to what it was and generally more appealing.
Fix scissor rectangle for sun post-process.
Execute sun post-process after stars, atmosphere and sun are rendered.
Add updated per-instance attributes to an array instead of looping over all attributes.
Merge remote-tracking branch 'agi/master' into sphereGeometry
update for changes in EllipsoidGeometry
clone options
Merge pull request #939 from AnalyticalGraphicsInc/sunPostProcess

Fix sun post-process.
added rendering specs
Fix some formatting.
Add ability to rotated texture coordinates of an extent.
Cleaned up trailing whitespace in Sensors.html.
extruded extent sandcastle example
add comment
added note about extrusion to CHANGES.md
Merge pull request #936 from fstoner/sensorSandcastle

Sensor sandcastle controls
Check if the attribute has already been added to the dirty list.