SoLoud "TLF" release

[Jari Komppa]

Changes include:

• PortAudio, winmm, oss, wasapi, xaudio2 and openal back-ends
• Simplified cleanup - no separate cleanup functions per back-end
• Simple cross-platform thread support for back-ends that require it
• Filter interface revamped
• Echo, fft and biquad resonant (low/high/bandpass) filters
• Switched from ffft to a simpler (and slower) fft implementation
• Faders can now oscillate
• wav/ogg files can be loaded from memory
• AudioInstance -> AudioSourceInstance rename
• SoLoud core split into a bunch of source files to keep things manageable
• Various changes aiming at multi-channel support; hardcoded stereo support removed
• Audio samples no longer interlaced to simplify filter processing
• Simplified init and wave loading by removing useless options or moving them to constants in soloud.h
• Mixing busses implemented
• Visualization via FFT or waveform supported, requires init flag to work
• Resampler interface and linear resampler
• Granularity of audio buffers fixed to a small value, configurable via soloud.h
• Per-sample volume faders
• Reworked old and added more example applications
• Premake4 script for project files to generate static libraries
• Reorganized files for easier handling (single include directory, etc)
• Lots and lots and lots of bug fixes and mixer rewrites