- better text size guessing also for FIG
- let user to enable/disable recursion; communicate sheet boundaries to backend
- unify alignment, direction
- support fonts attributes ?
- support line thickness ?
- ~ as overline (grep for ~ in out.fig)
- glabel: build for "right" style, then rotate poly (like hlabel)
- show open pins / wires
- check remaining alignment / direction / rotation cases in switch statements
- convert abort / assert(0) to proper error indications
- support mirroring (and detect-complain if unexpected)
- pin shapes (inverted, clock, etc.)
- optionally display pin shapes
- find libraries (e.g., from .pro)
- PDF TOC
- generic layering for cairo (and others ?), where primitives are first
  recorded in per layer lists, then replayed. Can also calculate BB.
- let user set PNG size or zoom level
- implement dashed lines in cairo.c
- implement PDF output in cairo.o
- generalize gfx option passing
- use correct color for hierarchical items, 0x848400 (or close) instead of
  COLOR_BROWN2
- directly pick versions out of git, without requiring checkout to file
- handle differences
- parse .kicad_wks
- on parse error, politely complain, don't terminate
- implement destructors
- check for memory leaks