disabled DEBUGGING

updated README

fixed fps display, target fps not reached, but likely due to cooperative nature of the Julia task system. Won't fix this further

target_fps now seems to be reached

timing debug info

eod

fixed typo

Added colormaps colorwheel and blue_to_red

Added default colormaps for unsigned and signed integers

default colormap

Assigning to Canvas{T} now correctly converts types to T

Update README.md

Well optimized setindex! for the rgb_immediately case

colormap on setindex! now implemented, but still slow

Removed spurious specification of length and axes for Canvas (the default fallback is fine)