Change Fill type to explicit HFill and VFill types, support HFills with heights
Change Fill type to explicit HFill and VFill types, support HFills with heights

Ignore-this: 48495b98668202bce06b38ca8baaa714

darcs-hash:20090930013309-e018d-4e04c1eef16f8bb66172b7f0433ae4a1a71f6675.gz

ktvoelker/vty-ui,KommuSoft/vty-ui