Fix compatibility with a variety of non-WebGL browsers.
Update README.md
Change license from MIT to Apache 2.0 so we can use the same CLA as Cesium
Rename LICENSE to LICENSE.md
Merge remote-tracking branch 'origin/master' into compatibility
Fix #15, and update license per f0377e1a.
Merge pull request #14 from AnalyticalGraphicsInc/compatibility

Fix compatibility with a variety of non-WebGL browsers.