fixes for windows: 1) move block of temp directory specs for nginx above the server block, will prob be required for new version of nginx 1.7 on all platforms.  2) add an = to the location spec for the root-level redirect to prevent race condition resulting in infinite loop of redirects.  3) add some mysterious sleep cmds to avoid a race condition or something. 4) skip the posix file permissions as they do not exist on windows.  this means if other people can log onto your windows box then it is insecure for beaker.  4) add python to where we fork scripts since windows does not handle the #! construct.  5) quote backslashes in path to R password file since R chokes otherwise.
Merge branch 'master' of https://github.com/twosigma/beaker-notebook into windows-fixes
tab to spaces
more whitespace fixes, rename windows to isWindows
Merge pull request #325 from twosigma/windows-fixes

Windows fixes