That Makefile is platform-specific and never going to build under Windows.  How about a nice Ant build file instead?

I've only implemented the build targets 'build' and 'clean', so 'test', 'dist' and 'doc' are not implemented.
Oh dear, these tests weren't compiling.  I guess the class RGeomerative has been renamed RG since the last time they were run.
A more complete Ant build file :-)
Addressed some typographically issues with the help.
Change the XML() constructor used here.
Geomerative wasn't building because the constructor in use before was commented in Processing revision 2646049ce4a1f805456fe85ddf79795f4c0a3e0e
install-linux and install-macosx build targets (fingers crossed).
Merge pull request #3 from Antony74/master

An Ant build script, and some typographical tweaks?