Log Message:
Update to 2.2.1:

Library:
* Fix crashes in the AA canvas. (Andreas Holzmann).
* Make affine transformations work for pixbuf items (Jim Evins).
* Fix rotation of outline widths for rect, ellipse and polygon items.
  (Jim Evins).
* Fix redrawing bugs (Tim Janik).
Build:
* Fix localedir setup and random fixes to make it distcheck (Kjartan).
Docs:
* Completely revamped documentation (Josh Green).
* Some fixes from Sebasian Rittau.
Translations:
* cs (Miroslav Trmac), ga (Paul Duffy), ml (Guntupalli Karunkar)
  sr (mdfk@root.co.yu), sr@lat (mdfk@root.co.yu), yi (Raphael Finkel).