Bugs:
No backdrop displayed in XFCE4
   - Kill xfdesktop
   - Or write to named/identified window
   - Or use appropriate API?
Loops possible in binding code
Orbit refs don't seem to work in terminator { sun {} } section
Sunpos orbit is massively astronomically inaccurate
doc/examples/all-projections crashes on exit with double-free

Features:
Double-check licensing for plugin interface (LGPL?)

Supported render options for Output plugins: text, pixel, line

Outline content and data
Fix edge conditions on projections
Give projections hints on pixel sizes?
  (Or do something to work out approximate scaling incrementally)

Labels
More projections
 - conical
 - Peters?
 - Dyson?
Code to help parsing subsections (with plugins)
Check that headers are installed correctly
Version handling for plugins
Geodesics
magellan-config script/tool?
X root plugin - allow writing to a named/identified window
Multi-threaded rendering

Better debug reporting on failure to bind sections (c.f. mdisplay.cc/bind())
Profiling to work out where rendering cost is
Do valgrind checks