Fix warnings
Build and run tests on NaCl
Merge branch 'test_on_nacl' of https://github.com/sbc100/regal
Add enums for GL_HP_image_transform
Add enums for GL_SGIX_fragment_specular_lighting
Runtime flag for thread locking - work in progress
Platform notes for NaCl builds
Disable extra logging diagnostics for REGAL_SYS_PPAPI=1, for performance reasons