1)  Implement ANSI CSI CU[BDPU] sequences & italic
2)  Layers & layout (e.g. for comics, zines, etc.)
3)  Implement instrumentation & unit tests, document
4)  Open and toggle a reference image in the background
5)  Client-Server or Peer-to-Peer realtime collaboration
6)  Arbitrary {format,palette}s ({4,8} bit ANSI/mIRC, etc.)
7)  Incremental auto{load,save} & {backup,restore} (needs Settings window)
8)  Sprites & scripted (Python?) animation on the basis of asset traits and {composable,parametrised} patterns (metric flow, particle system, rigging, ...)
9)  Composition, parametrisation & keying of tools from higher-order operators (brushes, filters, outlines, patterns & shaders) and unit tools
10) GUI: a) switch to GTK b) replace logo w/ canvas panel in About dialogue c) {copy,cut,insert from,paste}, {edit asset in new canvas,import from canvas}

High-priority list:
1)  geometric primitives: arrow, circle, cloud/speech bubble, curve, heart, hexagon, line, pentagon, polygon, rhombus, triangle, square, star
2)  region filters: crop, duplicate, erase, fill, invert, measure, pick, rotate, scale, select, shift, slice, tile, translate
3)  text tool: a) allow navigating w/ cursor keys b) Unicode set key & GUI w/ MRU
4)  fix outstanding {re,un}do bugs
5)  GUI: {de,in}crease cell size
6)  GUI: MRU {directories,files}
7)  cleanup & refactor

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