Add sun position automatic uniform.
Start adding sun rendering.
first take on extent rotation
replace quaternion rotate with matrix rotate
relocated declaration of rotation matrix
sample - adding link
Merge branch 'master' into sun

Conflicts:
	Source/Scene/SceneTransitioner.js
Frustum cull the sun.
Add fragment shader for pretty lame looking sun.
Update sun fragment shader.
Draw sun after the sky atmosphere.
Merge branch 'master' into sun
partial solution for #718
Merge branch 'master' of github.com:AnalyticalGraphicsInc/cesium into jsdoc
fixed sample link
Merge branch 'master' into rotateExtent
rotate positions before triangulation
Merge branch 'master' into rotateExtent
Merge branch 'master' into sun
Re-add sun bloom without post-processing framework.