Replace size-request by minimal height-for-width
Replace size-request by minimal height-for-width

The size-request method is now gone, in favor of height-for-width
allocation. The height-for-width implementation is currently minimal,
as described at
http://developer.gnome.org/gtk3/stable/ch24s02.html#id1328275
This could be made much nicer.

wmvanvliet/Chimara,wmvanvliet/Chimara,wmvanvliet/Chimara,wmvanvliet/Chimara,wmvanvliet/Chimara