Remove .lbox, move .lbox.check

Co-opted .lbox.check as a pre-push hook.
Merge pull request #4 from axw/pre-push-script

Co-opted .lbox.check as a pre-push hook. The script should be symlinked as .git/hooks/pre-push.

Also, "go fmt" charms/action_test.go (picked up by pre-push hook).