Shorten default transition duration
Revised stats printout
Optimize render_command_list
Fix mixer timing to adjust for FPS
Optimize a few presets
Assume integer RGB tuples for performance
Remove Preset's performance monitoring code for now
Update preset framerate.  Sort framerate histogram.
Add argument parsing
Update readme
Mixer and Preset output profiling debug only with --profile switch
Merge pull request #6 from craftyjon/feature_numpy

Merge rewrite of mixer using numpy for buffers.