use reference counts for the underlying bitmap container so it can be shared easier between Bitmap objects and mutated
use reference counts for the underlying bitmap container so it can be shared easier between Bitmap objects and mutated

scristopher/paintown,scristopher/paintown,scristopher/paintown,scristopher/paintown,scristopher/paintown,scristopher/paintown,scristopher/paintown,scristopher/paintown