fix various and vicious bugs in font generator due to bash semantic issues
texture: detect s3tc support
render: use premultiplied alpha
emscripten: add logs in debug build
texture: add initial support for dxt1/s3tc format
Properly load DDS file format
emscripten: don't bundle png
etc1: restore old pkm-header support
atlas: replace PVR tool by android-sdk's etc1tool
texture: emulate etc1 support if missing
Test integrating AntTweakBar as a submodule but it crashes yet...
Update AntTweakBar
Use proper glm version to avoid compilation warnings when building android release version
removed various warnings generated by clang/gcc on linux
build script: remove tremor cleanup
android: add missing include
atlas generation: remove assetspc
fix alphabet sprites generator for special characters
add option --atlas for generate_atlas script
fix generate atlas script