Implemented amplitude ramping for NON-REVERSED playback.  Bugs still plague reversed playback amplitude ramping.
Added unit test for amplitude ramping.
Refactored the playback-speed code example/test.
fixed amplitude ramping. need to typecast the info[x].pos to 'int' before checking if it's less than 0.
Merge branch 'amplitude_ramping' into dev
Committing new README.