new directory structure

compile libbirdfont without gtk

remove native gtk window from libbirdfont

remove some unnecessary code

continue drawing path from the other end

reject invalid background images

draw background before juxtaposing glyph

position is updated when background image is cut and larger control points

undo for cut background image

set image position in cartesian coordinate system

embed background images

cache background thumbnails

always show new backgrounds

crop background image

handles for background tools

scale background

create thumbnails for background images

opacity for edit point icons

Initial commit

Initial commit