Promote ETC1 to Draft.
Merge pull request #429 from jdashg/draft-etc1

Promote ETC1 to Draft.
Fix broken path in WEBGL_compressed_texture_etc1
Fix incorrect numbers in extensions

In pull request 337 (commit cb547d713104a) I incorrectly updated
the extension numbers for three community reviewed extensions. Revert
this.

Also, add a status date for the compressed texture ETC1 extension.
Assigned extension #24 to WEBGL_compressed_texture_etc1 extension.
Merge pull request #432 from kenrussell/etc-number

Assigned extension #24 to WEBGL_compressed_texture_etc1 extension.
Added history entry for assignment of number to WEBGL_compressed_texture_etc1.
Merge pull request #433 from kenrussell/etc-history

Added history entry for assignment of number to WEBGL_compressed_texture...
Added context-creation test to stress test that many contexts can be created without spontaneously failing.
Addressed pull request feedback
Merge pull request #434 from toji/context_creation_2

Added context-creation test
Manual test for leakage.
review fixes.
Merge pull request #436 from baxissimo/instancing-leakage-test

Add a manual conformance test for ANGLE_instanced_arrays state leakage.
fix bug link. crbug.com, not crbug.org.
Merge pull request #438 from baxissimo/fix-link-in-test

Fix bug link. Should be "crbug.com", not "crbug.org".
Added rapid canvas resizing test as regression test for Chromium Issue 299371.
Merge pull request #439 from kenrussell/resizing-test

Added rapid canvas resizing test as regression test for Chromium Issue 2...