add limit/2 and limit/3, fix custom/3 morphology

identify/2 :format option

format/2 fixes, create/2 buffer fix, Windows fixes

convert and identify, not mogrify, to fix input file overwrite

throw error from save/2 and create/2, config imagemagick paths

add Plasma support similar to Pango

make dirs when saving, annotate fix, tag Pango tests

quality/2, Windows fixes

create/2 options :buffer and :into

histogram/1 fix for RGBA