- unix symlinks are incompatible with Windows
- postinstall now generates keys, and sets up files

fixes #2263

    * comment that i think it will work with python 2.6
    * write out a credentials.yaml file if it doesn't exist
    * save results to different folders so you end up with all of them
    rather than just the most recently finished

    put in missing comma

    it was causing a file "-.html" to be created

    pull out sauce and globalize no proxy

    no more StaleElementException, hopefully

    rework --everywhere

    since it probably maxes out at 3 browsers, removed the limitation about
    doing --all and --everywhere at the same time

    changed python version limitation to 2.6

    update README to warn people about python on windows

    append .exe to program names so they can be found on windows

    run.py now runs well on windows and -e calls both FF and Chrome

    IEDriver does not provide a clean environment, tests will Error from
    the second run
    Opera does not have a local WebDriver implementation.

git-subtree-dir: automation-tests/browserid
git-subtree-split: f4063ba738486918a9a2fedea3545f37f949e3d6

generate a persistent secret for cookie encryption at first server run.  still in pursuit of zero-config and as stateless as possible.