removed fine paint mode (too slow)
cleanups
made Render class for paint tool
added fine paint mode
added watercolor paint mode
added chalk paint mode
tweaked chalk paint mode
space bar interfered with Fl_Choice
working on undo bug
fixed undo related bug
fixed undo related bug
updated readme
improved chalk paint mode, bugfixes
cleanups
optimized quantize to use less memory
bugfixes
preserves darkest/brightest values
fixed tga not loading last pixel in each direction
dithering considers luminance now (experimental, should be optional?)
lowered dithering noise, fixed darkest/brightest color bugs