IDA binary differ. Since code.google.com/p/patchdiff2/ seemed abandoned, I did the obvious thing…
The IDA provided makefiles seem ancient and more work than needed. I will change the Makefile to be more easily digested and to not rely on weird build systems. Ref: http://reverse.put.as/2011/10/31/how-to-create-ida-cc-plugins-with-xcode/
The vs/ directory wasn't deleted, but I don't have the means to maintain it. If anyone has patches for it, please submit them.