Resolve more issues with the clock

* Each _configure() call would spawn another chain of timeout calls, which is
  not so great. Now we check the configured flag so as to only spawn one chain.
* Widgets which had not yet been __init__'d when clock was _configured()
  (updated()) would die, since their defaults were not initialized. This commit
  defers starting the clock update chian until the event loop is idle -- that
  is when there is no more initialization to be performed.
Add missing import
Minor: typo

Closes #270
Fix xpyb(-ng) documentation
Fix crash in mpd widget
Use DEBUG to log timer events

Conflicts:
	libqtile/widget/base.py

Closes #253
Vim-like keys for moving left/right and swap

Commands to move left and right. Swap windows-commnd. Swapping current window
with with closest window in one of four directions. Keys for vim like focusing
and swapping of windows with modkey-[hjkl] and modkey-shift-[hjkl]

Closes #278
Fix missing non-ascii symbols in window titles

Closes #279
Removed duplicate property

Closes #280
Set up configurable output formats in MPD widget

Closes #272
Avoid a common python gotcha
New package for ubuntu version

I packaged master, but I figured I'd throw this commit here. This way it'll
force us to have a release before 13.10 :-)
Closes #285
Only build one copy of qtile for all architectures

Hooray python :-)
Fix #282: focus on next window on kill in TreeTab
Update test documentation
Xmonad layout works with relative secondary sizes

...to properly handle different screen sizes.

Closes #287
java focus workaround

workaround for #227
Closes #227
Closes #289

@tych0: rearranged some code
Added more info formats, and fixed a bug in one
Fixed the clumsy handling of %% in format strings.