fix for bolt.Path.getNorm on Python 2.7.8

Would return a Path object if it was of the form Path(u''), apparently
Path(u'') no is True for `if not name`, prior to this is was not.
Installer creation fixes

Some issues that came up, due to changes in the Python website, as discussed
in #58, prompted the following changes:
* Tested with NSIS 3.0, as I could not get the Inetc plugin working with 2.x
* Had to change /LANG=${LANG_ENGLISH} to /LANG=1033, because for some reason
  NSIS 3.0 did not like those lines, and I could not figure out how to fix it
  "correctly"
* Changed command line arguments on the MSVC 2005 redist, as it was raising an
  error as it was
* Uses Inetc NSIS plugin to download Python now, as NSISdl was having issues
  http://nsis.sourceforge.net/Inetc_plug-in)
* Packaging script now checks for Inetc, and provides more information on it in
  the --tutorial