Consolidation of environment variable queries at runtime.
ARB_texture_cube_map and EXT_texture_cube_map for ES 2.0
IFF emulation improvements
Emscripten build improvements
Update zlib to version 1.2.8
Update libpng to version 1.6.3
Update mongoose to version 3.8
Make it build on VS2013
Fix emscripten config; make dreamtorus work
Merge branch 'master' of https://github.com/vvuk/regal
Touch-ups, mostly for emscripten.
Merge remote-tracking branch 'github/master' into snations