GLEW refresh (w.r.t opengl.org)
Some GL API harmonization with apitrace.
Add Regal support for GL_SGIX_ycrcb
Further GL_REGAL_enable support for glEnable/glDisable of dispatch layers.
DSA emulation moved to downstream of Regal::Emu::Iff
Trace dispatch fixes for WGL
Support for REGAL_TRACE_FILE setting, and JSON property.
Tidy-up of Regal::Emu::Filt
Re-do ES2 dispatch table initialization.
eglMakeCurrent calls RegalMakeCurrent.
Avoid crashing if Regal::GetProcAddress points to Regal entry point. (oops!)
README.rst updates - REGAL_NO_TLS, etc.
Rename GL_REGAL_enable GL_LOADER_REGAL to GL_DRIVER_REGAL
Compile-time support for REGAL_DRIVER.
Add support for compile-time REGAL_EMULATION=0 to compile-out emulation support.
Add support for REGAL_EMULATION environment variable - replaces REGAL_NO_EMULATION.
Initial GL_REGAL_enable infrastructure for runtime glEnable/glDisable control of Regal features such as error and debug checking.
Add support for REGAL_NO_TLS compile flag.
GLEW refresh.
Public domain license for dreamtorus example code.
