Ubuntu package updates for 0.5

Closes #194
docs: gentoo install updated

Closes #195
Unbreak WM_STATE, remove another unnecessary error message.
Merge pull request #196 from cjbarnes18/WM_STATE

Unbreak WM_STATE, remove another unnecessary error message.
Remove window.Internal.create

...in favor of window.Internal.__init__

Closes #198
Maildir widget now supports labels

Closes #199
Patch to allow gradent drawing

Closes #197
Allow internal windows to be destroyed if needed

Closes #202
replaced click name with button_press to be more consistent with XEvent
added support to button release in widgets
Remove old documentation
Add documentation for starting Qtile

Closes #119
restart when number of screens changes

Closes #32
Merge remote-tracking branch 'Roger/click_to_button_press' into develop

Closes #207, Closes #205
Don't normalize xmonad on add.

Closes #204, Closes #160
Remove some confobj calls in the docs
fixed dgroups with unnamed windows
don't call _configure every resize of screen

this re register widgets and makes some calls that make qtile unstable
Thanks to dx for helping debug this
update _NET_WM_DESKTOP of windows when group is switched
fix Gap that doesn't have draw method