various git tools / scripts

by me:

    git-dir-blame : annotate directory contents
    git-mean-commit-message-bytes : mean commit message size
    git-tidy-up : runs prune, gc, fsck

by others:

    git-publish-branch : easy add / delete of remote branches
    git-wtf : state of branches WRT merge status local/remote
        - original repo: https://github.com/michaelklishin/git-wtf
        - now at https://gitorious.org/willgit/mainline
        - i have a custom patch to use regexp on ignores