Merge branch 'namespaced' of git://tremily.us/swc-setup-windows-installer into assembled

* 'namespaced' of git://tremily.us/swc-setup-windows-installer:
  swc-windows-installer.py: Use regular expressions to POSIX-ify paths
  swc-windows-installer.py: Only create the python-scripts dir if it doesn't exist
  swc-windows-installer.py: Split out zip_install into its own function