Fix sun rendering in IE11.

IE11 doesn't yet support TRIANGLE_FAN.
Update CHANGES.md.
Merge branch 'master' into ie11Sun
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Test missing parameter behavior
Update Dojo from 1.9.1 to 1.9.3.
Fixes sampleTerrain with STK World Terrain on Firefox.
Make sampleTerrain wait for the terrainProvider to be ready.
Update CHANGES.md.
Merge pull request #1743 from AnalyticalGraphicsInc/fixDoc

Minor documentation fixes.
Merge pull request #1744 from AnalyticalGraphicsInc/issue1739

Fix two sampleTerrain problems
Merge pull request #1741 from AnalyticalGraphicsInc/ie11Sun

Fix Sun rendering in IE11
Merge master to dojo-1.9.3
Merge pull request #1742 from AnalyticalGraphicsInc/dojo-1.9.3

Update Dojo from 1.9.1 to 1.9.3.
Merge pull request #1740 from andre-nunes/math

Test missing parameter behavior
Merge remote-tracking branch 'origin/master' into jsDocUpgrade