Import mozilla/bidpom.git as automation-tests/browserid using git subtree

    Command used: "git subtree add --prefix=automation-tests/browserid \
        --squash git://github.com/mozilla/bidpom.git master"

    git-subtree allows us to interact with upstream, while keeping the bidpom
    module visible to the super-project. learn more here:
    http://apenwarr.ca/log/?m=200904#30

    Here is the default git-subtree commit message:
    Merge commit 'df32ab8c' as
        'automation-tests/browserid'