Testing ARB_direct_state_access, beginning with the 2D texture functions.
DSA texturesubimage test.
Testing glBindTextureUnit.
dsa-textures.c can now specify which texture unit the texture is bound to.
Added utils 'class' for direct state access.
Updated gl.xml to reflect new gl-4.5 features (namely arb_direct_state_access)
Fixed gl.py so that it correctly parses the new gl.xml file.
Removed dsa_wrangle_functions.
Added CreateTextures test.
texturesubimage.c: removed unneeded dependency on dsa-utils.
DSA texture-storage test.
DSA texunits test (adapted from tests/general)
Added test for TextureParameter* and GetTextureParameter*.
Added tests for glGetTexLevelParameterfv to texture-storage.c
Added a shell script to run all of the dsa tests with one command.
Added tests for CopyTextureSubImage*D.
Tests for glGetTextureImage.
Allocates texture storage for GL_TEXTURE_CUBE_MAP correctly.
Added a test for glGetCompressedTextureImage. Needs more work.
Added an additional test for glGetCompressedTextureImage.  Unfortunately it doesn't work.