Added note about non-ANGLE support to ANGLE_instanced_arrays spec
Make negHuge actually negative in float_literal.vert.html test

Just a simple typo fix. This is not a critical bug, and technically the
fix increases test coverage, so it's not backported to earlier releases.
Modify WEBGL_draw_buffers extension spec.
Merge pull request #348 from toji/instance_angle_clarify

Added note about non-ANGLE support to ANGLE_instanced_arrays spec
Merge pull request #350 from NVIDIA/float-literal-neghuge

Make negHuge actually negative in float_literal.vert.html test
Deleted two accidentally-committed files.
Merge pull request #354 from kenrussell/cleanup

Deleted two accidentally-committed files.
Per kbr's review
Merge pull request #353 from zhenyao/mrt

Modify WEBGL_draw_buffers extension spec.