New feature implemented: latch to lock. Press a modifier key 1 time to
latch it and press it again to lock it.
Many bug fixes and code cleanup.

Changelog:

2010-01-26 François Agrech <f.agrech@gmail.com>
	* Version 0.4.6
	* fix layouts
	* redesign status with a FSM table
	* add a list of known bugs in the documentation
	* Fix zoom key issue (Florence failed to refresh)
	* Remove unecessary dependancy on gnome-doc-utils with --without-docs
	* Change icon
	* fix crash on fedora 12

