TODO
Stuff we realy need
* tests in xt/ to test for correct Build.PL behavior when modules are missing, etc...
Stuff to do SOON
* port remaining test files to use Test::Class
Stuff to figure out
* check for minimum SWIG version
Stuff to fix
* make sure in Build.PL that the GSL include files are where we think they are, so that the compilation doesn't blowup when people have put there headers in a non-standard place
* make sure blib/ files are copied to correct place in lib/
* make the interface files not be hardcoded to /usr/local/include/gsl, investigate SWIG preprocessor