D3D: Implemented cache for dynamic render states
D3D: Moved render state cache into separate source files.
Refactored  StateCache::Get() to early out for narrower indentation.
Added comments to clarify ownership of objects returned by  StateCache::Get().
D3D: State cache now uses BitField to define packed render states
D3D: moved render state cache implementation to D3DState.h/cpp
D3D: Fixed uninitialized members of gx_state
Start/Stop Audio Dump During Emulation
Flipped Wave File Channels

This change was done because with the previous method of dumping audio, the mixer would handle switching the RL being emitted by the DSP to LR, and thus would provide the proper channel orientation. Because we're now dumping directly from PushSamples() and PushStreamingSamples(), it was writing the right channel to the left channel of the wave file and vice versa.
D3D: State cache now reduces number of blend state permutations by collapsing some states that have blending disabled
Specified where GC Bios files go
D3D: Removed SetBlendOp, SetSrcBlend and SetDestBlend as they are now trivial
Merge pull request #475 from kayru/d3d_state_cache

D3D: Implemented cache for dynamic render states
Merge pull request #1276 from RisingFog/flipped-audio-dump

Flipped Wave File Channels for Audio Dumping
Merge pull request #1297 from RisingFog/audio-dump-during-emulation

Start/Stop Audio Dump During Emulation
Merge pull request #1310 from Stevoisiak/patch-1

Specified where GC Bios files go
TASInputDlg: Apply m_ prefix to class member variables.
Merge pull request #1319 from lioncash/tas_vars

TASInputDlg: Apply m_ prefix to class member variables.