Changes to run within Windows 7 64 Bit

Hi Ben :)

I made the attached changes to allow it to be run on a Windows 7 64 Bit machine and we tested it on two machines successfully. Beside the small changes needed to compensate the OS differences I did:

- I updated the README, please feel free to change/rewrite
- I was missing a copy of your f32read.m in the repos and placed it where also int32read.m is stored
- I use an external benware.bat in the users TEMP folder to avoid having Matlab's DLL's in the PATH when running python or klustakwik
- I was missing get{files|dir}matching.m and assume Windows needs its own version anyhow with having a bash available and therefore wrapped http://www.mathworks.com/matlabcentral/fileexchange/32226-recursive-directory-listing-enhanced-rdir
- added klustakwik/klustakwik.PCWIN.exe taken from http://klustakwik.rossant.net/klustakwik-setup.exe
- could you please double-check in clusterspikes.m at line 149 my "parentDir" vs "dir" fix

:) stefan