cleanup in wrapper folder

[bruceravel]

The folders called wrappers/perl and wrappers/python date from a time when I needed something working quickly and so made a SWIG wrapper around the path calculator library. That should go away now.

wrappers/perl-inline-c should be renamed wrappers/perl. And wrappers/python-ctypes should be renamed wrappers/python. The SWIG-based folders should be simply deleted.

Matt, if you could do that for the python, that would be great. I'll do that for the perl.

The bits in src/GENFMT/SConstruct that run SWIG have already been commented out.

Eventually, I will upgrade the testing framework to use the proper python wrappers.