Clarify that conformance test 'version'.

Switched out 'Version <version>' with 'Subset: Version <version>' to
clarify that it only changes the subset of tests, not the actual versions
of the tests run.
Merge pull request #460 from jdashg/version-reword

Clarify that conformance test 'version'.
Add link to previous conf test dir.
Merge pull request #461 from jdashg/version-reword

Add link to previous conf test dir.
Add a test for texture2DProjLod.
Merge pull request #456 from c0d1f1ed/texture2DProjLod

Add a test for texture2DProjLod.
Updated origin-clean-conformance.html to emulate cross-origin requests when running from localhost
Add test for Chromium crash when a GPU buffer is deleted

When preserveDrawingBuffer is true and WebGL context leaves a vertex
attribute array != 0 enabled while deleting the buffer attached to that,
Chromium's (at least up to version 33) GPU process will crash when
copying the WebGL drawing buffer. Reproduces at least on NVIDIA OpenGL
drivers.
related to pull request #451: added needed check also for versions 1.0.1 and 1.0.2
Expand float texture extension tests to test rendering to RGB textures

Also fix incorrect alpha values in the expected values in the test and
some minor things in presenting test results.
Moved localCrossOrigin utils into WTU, fixed readPixelsBadArgs
Merge pull request #463 from imzet/utils-vbo-use-prev-versions

related to pull request #451: added needed check also for versions 1.0.1...
Merge pull request #464 from NVIDIA/expand-oes-texture-float-test

Expand float texture extension tests to test rendering to RGB textures
Add GPU buffer deletion test to test list
Merge pull request #462 from NVIDIA/bufferdata-delete

Add test for Chromium crash when a GPU buffer is deleted
Updated origin-clean-conformance.html to emulate cross-origin requests when running from localhost
Moved localCrossOrigin utils into WTU, fixed readPixelsBadArgs
Moved more common functionality to WTU
Merge
Merge pull request #467 from toji/cross-origin

Allow cross origin tests to run locally without dependence on an external server.