wm2 Code

* some more minor updates

* expose border when client label changes
* more debug out

* Fix bug that was causing palette type windows (above layer 7) to get
left behind when switching channel
* Add handling for eventMap without eventMapRequest -- some GTK options
windows appear to make extensive use of this for some reason I don't
fully understand
* Improve reporting for list out-of-bounds errors, and avoid crash if
for some reason the ordered list for a client's layer turns out to be
empty
* Better interaction with WM_CHANGE_STATE from task bar
* Fix failure to tidy up properly on exit
* Lots of debug output currently enabled

* Add rsharman patches raw, for future study

* Make it possible to "bump" windows against neighbouring windows as well
as screen edges

* Make it possible to focus on desktop with a mouse click
* Remove ability of clients to set their own layer explicitly (layers no
longer match up with original mwm spec)
* Move utility windows to a lower layer

...

* remove debug

* add support for "utility" type windows (previously overlooked)
* avoid calling gotoChannel when a NETWM channel request for current channel
is received (avoids channel number flashing up when selecting e.g. client
from gnome taskbar)

* update TODO