Add utopic release
remove debian install docs

This hasn't worked for a long time, so we should probably stop advertising it.
Add support for margins to a bunch of layouts.

All a layout needs to do to implement margins is add "margin"
to its config and pass it to _Window.place, which will update its
position and dimensions to account for the margin.
Revert "Don't unmap or withdraw dying windows"

This reverts commit 6577649bbb457527912e9894752333a4cd934331.

In fact, we *do* want to unmap and withdraw these windows, since they aren't
all destroyed e.g. by things which have a systray icon and activate their
"main" window by clicking on the systray icon. These windows are never
destroyed, but should be unmaped and withdrawn.

Fixes #477
Add possibility of custom command to manage volume
Merge remote-tracking branch 'dmpayton/feature/layout-margins' into develop
Add margin documentation
populate changelog for the next release
Merge remote-tracking branch 'jody-frankowski/commands_in_arg_volume_widget' into develop
Remove release notes from docs

It is annoying to have to port these to .rst every time, and it is non-DRY. We
should just link to the CHANGELOG file when we want to link to release notes.
Merge branch 'develop'
Release 0.8.0
Drop Encoding from the desktop file

Deprecated, see:

http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html
Fix swapped volume_up_command and volume_down_command in the Volume widget.

Closes #484
Switch to qtile-session

Using qtile-session to launch qtile is better as descibed in https://github.com/qtile/qtile/issues/485

Closes #486
Closes #485
debian/: 0.8.0 on trusty
Merge branch 'master' into develop
Merge branch 'cffi' into develop
renamed cmd_prevgroup and cmd_nextgroup

Closes #479
Command for hide/show bar

Closes #487