Destroy scenes in tests that were not destroyed
Destroy contexts that were not destroyed
Fix scene leak in CesiumWidget
Fixed leaked canvases
Fix incorrect URL to CesiumWidget.css.
Merge pull request #1302 from AnalyticalGraphicsInc/fixCSSPath

Fix incorrect URL to CesiumWidget.css.
Merge pull request #1300 from AnalyticalGraphicsInc/testscontext

Fix widget and test WebGL context leak
Fix whitespace and typos.
Add HTTP method and data to loadWithXhr.

Also switch to an options object, since most of the options are optional.
Added Matrix3 functions
Adding transform from scaled space to Ellipsoid.
Matrix3 tests
Updated CHANGES.md
Remove unnecessary override of loadWithXhr.
Adding missing ellipsoid scaled space tests.
Fixes after review.
Fix extra comma in example.
Merge pull request #1304 from AnalyticalGraphicsInc/addLoadWithXhrOptions

Add loadWithXhr options.
Merge branch 'master' into matrix

Conflicts:
	CHANGES.md
Fixed Matrix3.inverse documentation.