Catch up to lots of changes from bento/beta:

• Update list of quickports to include kde3

• Add ability to restart builds (-restart)

• Change default to build packages for non-cdrom use (associated option name inverted from -nocdrom to -cdrom)

• Cope with .tgz or .tbz packages

• Use buildenv framework

• Use cvs update -PdA instead of -Pd when updating ports/docs tree

• Always delete restricted packages after a build run, since they are published on the website.

• Minor cosmetic changes