Open files not in binary mode for Windows

On Windows with python 2.6 pyflakes 0.8.1 fails to process files with DOS line
endings (\r\n).
Use universal newlines only on python 2.6

Resolves lp:1397266
Merge pull request #10 from bitglue/windows

Resolves lp:1397266 (CR LF line endings fail on Python 2.6)