Remove some debug prints
Support colour masking when drawing nodes
Complete overhaul of the configuration system.

Configuration effects now propagate so that you can, for example, do:

type_is("media/video") { ... }

in library.cfg, and then in a later file

type = "media/video"

and the settings from the earlier file will be properly applied.
Add support for multiple library paths, which will be merged at runtime
Clean up startup messages
Better state transitions, and resolution-independent text size
Properly apply library settings to top level library
Parse command line flags (none actually supported yet)
Update the Makefile to actually work and stuff
.gitignore
Display full path instead of filename in title bar
Remove loads of dead code