* fix compilation problem on some C++ compilers * fixes in the python bindings
1.6.4
* small bug fix
1.6.3
* radius search speedup
1.6.2
* slight API changes to the C++ bindings, now the main index type is templated * on the distance functor which makes it easier to use custom distances * new kd-tree implementation optimized for low dimensionality data * experimental MPI support for cluster computing