Added support for the new python_win_prefix variable.   -> This needs to be backslashed.   -> all other variables on all other platforms (and on OS_IS_WIN)      need to be forward slashed.
Added support for the new python_win_prefix variable.
  -> This needs to be backslashed.
  -> all other variables on all other platforms (and on OS_IS_WIN)
     need to be forward slashed.

imitrichev/cantera,imitrichev/cantera,Heathckliff/cantera,Heathckliff/cantera,Heathckliff/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,imitrichev/cantera