Changed PHYSFS_file to PHYSFS_File to match rest of API's naming convention. This won't break binary compat (function signatures are extern "C" so name mangling doesn't apply), and I've placed a typedef for the old name to support legacy source code.

#!/bin/sh
ruby extconf.rb
make
cd ..
ruby installer.rb
cd physfs
ruby install.rb
cd test
ruby test_physfs.rb