- bin/audio/*: added demos datas, so user does not have to download them from website
- demos/*: missing stdio headers
- demos/welcome: another non-SDL sample added
- tools/resamplerlab/main.cpp: uninitialized variables, also bugfixed typo
- build/premake4.lua: moved locals to top in case user wants to tweak them
- build/premake4.lua: default settings produce non-SDL/native-only backend config
- build/premake4.lua: do not compile SDL samples if no SDL is found
- build/premake4.lua: 3dtest demo typo
- build/premake4.lua: welcome demo added
- build/premake4.lua: try to detect DXSDK_DIR as well