gitify init fails on windows

[rnestler]

On windows gitify init fails with

Traceback (most recent call last):
  File "c:\Python27\Scripts\gitify-script.py", line 9, in <module>
    load_entry_point('git-svn-helpers==0.9', 'console_scripts', 'gitify')()
  File "C:\Python27\lib\site-packages\gitsvnhelpers\gitify.py", line 177, in __call__
    self.commands.get(command, self.unknown)()
  File "C:\Python27\lib\site-packages\gitsvnhelpers\gitify.py", line 69, in __call__
    os.chdir(config.GIT_CACHE + package_name)
WindowsError: [Error 2] The system cannot find the file specified: 'c:/Users/rnestler/.gitcache/$PWD'

It looks like utils.basename() is broken on windows