initial optimizations to AudioMixer with mmx additions
more MMX optimizations to AudioMixer for delayed samples
resolve conflicts on merge with upstream master
repair a conflicted translation file
some really trivial magic number replacements
Merge pull request #2331 from birarda/audio-scaling

AudioMixer optimizations with MMX intrinsics
fix a reversed MMX add
Merge pull request #2333 from birarda/master

fix for reversed MMX add in audio mixer
Merge upstream/master into "no hands" project.