Merge pull request #198 from vonture/master

Fix undefined behaviour in rendering/more-than-65536-indices conformance test
Merge https://github.com/KhronosGroup/WebGL/pull/198 to top of tree conformance suite.
Merge pull request #199 from kenrussell/merge

Merge https://github.com/KhronosGroup/WebGL/pull/198 to top of tree conf...
Added extension proposals for OES_texture_float_linear and OES_texture_half_float_linear.
Merge pull request #200 from kenrussell/linear

Added extension proposals for OES_texture_float_linear and OES_texture_h...
Added proposal for ETC1 texture compression extension
Update extensions/Makefile
First pass at ATC conformance test. Embedded texture data is valid.
Removed non-applicable portions of the conformance test, added a couple of additional restrictions ATC enforces.
Removed from old location
Added regression test for graphics driver bug affecting end cap rendering in MapsGL (Radar 13239314).
Fixed test description.
Fix a few bugs in ext-draw-buffers.html
Merge pull request #205 from zhenyao/draw_buffers

Fix a few bugs in ext-draw-buffers.html
Addressed Gregg's code review feedback.
Merge pull request #204 from kenrussell/pointcoord

Added regression test for graphics driver bug affecting end cap renderin...
Merge pull request #201 from toji/etc-spec

Proposal for ETC1 texture compression extension
Update test docs
Merge pull request #206 from greggman/fix-docs

Update test docs
fix document type, local path; both of these should be inferred from an index that's not the Makefile, please hold