Fix exclusion of favicon.ico and robots.txt on Windows.

The use of path.sep is incorrect because req.url is a URL, not a file
path, and so always contains forward slashes.

I verified that the original code does not work on Windows and that
the new code does.
update bootstrap to 2.2.2
Fix for allowing piping of password to deploy

When piping password from bash $echo MYPASSWD | meteor deploy MYSITE stdin.setRawMode() is not available. Check availability before calling.