Fix slave behavior on add in halflayout
The options stuff is in the "options" object, not "KWin"!

This explains why windowShown was never used
Don't stop setClientGeometry when the client is marked as resizing

If it has the right geometry already, it'll stop on the compare.

If not, it needs to be set again.
Don't set tile.rectangle when client is moving

This is of no use as it will be set once the move ends anyway
Properly respect min/max again

Turns out we just set it too early
Release 1.6.1

* Add support for multiple (or zero) masters in halflayout (default
  keybindings: "M-S-+"/"M-S--")
* Define master in spirallayout
* Respect min/max properly
* Fix graphical corruption (again)
* Reduce amount of unnecessary maximizes