------ - Added `scroll_sprite` method. - Moved platform checking code to its own module.
0.8.6
------ - Fixed bug with vertical sprites not allocating the correct amount of sprite space.
0.8.5
------ - Fixed timing issue with servos and USB response.
0.8.4
------ - Default serial port is set to blank on error and added 'requires' to setup.py - Added new installation docs. - Fixed firmware bug with legs 0 and 1.