Fixes issues #376, #366

In Windows SublimeLinter never can find cpplint.py, because 
`subprocess.Popen(['cpplint.py'....`
gives 
`WindowsError: [Error 193] %1 is not a valid Win32 application`
Related to #294 and #288  too.
The solution works for me on Windows 7 x64, ST2 2217, Python 2.7.7 and don't breaks anything on Debian 6, same ST2, Python 2.6.6.
More reliable solution is mentioned in https://github.com/SublimeLinter/SublimeLinter/issues/294#issuecomment-13212377 comment.