Summary: Modal Editing Witch

Description:
This is the core module of mew, a general modal editing engine generator.
You can provide `Key`, `Mode`, and `Concurrent` modules to define the
real world environment to get the core component of a modal editing
engine. The core component supports recursive key mappings associated
with user provided modes. After the core component is generated, you may
extended it with a translator to interpret user key sequences to get a
complete modal editing engine.

Maintainer: tv