Code for researching heuristic search algorithms.

You can build with either GCC or clang.  If one or the other doesn't
work then it is a bug so please tell me.

Ubuntu package dependencies:
	libboost-dev

The plat2d/watch binary and graphics code also need:
	libsdl1.2-dev libsdl-image1.2-dev

search/learnh/lms needs lapack:
	liblapack-dev

Clang versions less than 3.0 do not seem to work.