ditch highlightformats, mapping is enough
better format for default_mapping: ordered and no double style definitions
rename ly hilite to highlight, add alias hl, document commands better in help
distinguish between mapper and mapping, make ly.colorize fast to import
textformats now loads defaults from ly.colorize
use a named tuple to describe a default style mapping item
namedtuple
textformats and prefs now build on ly.colorize
fix save