- Update to 0.9.1:
* Client minimization (controlled by the attribute 'minimized' of
every client)
* The 'index' attribute of tags is now writable. This allows adjusting
the order of existing tags.
* New child object 'focused_client' for each tag object.
* New child object 'focused_frame' for the tiling object of each tag
object.
* New child object 'parent_frame' for each client providing the frame
the client sits in
* New command 'mirror'
* New command 'apply_tmp_rule'
* The 'apply_rules' command now reports parse errors
* Reserve space for panels that do not set _NET_WM_STRUT e.g. conky
windows of type 'dock'.
* Only build json object doc if WITH_DOCUMENTATION is activated
* Bug fixes:
- When hiding windows, correctly set their WM_STATE to IconicState
(we set it to Withdrawn state before, which means "unmanaged" and
thus is wrong). This may require restarting pagers when upgrading
hlwm live.
- Fix crash in 'split explode'
- 'split explode' preserves the window focus (as in v0.7.2 and before)