Fix for compiler error on windows

removed __host__ from the GPU result sets, as xerion reported it to break the windows build. And fixed the cuda cmake build, as the -arch sm_13 was there twice, causing a compiler error

... just skip building the MATLAB bindings.

Conflicts:
	CMakeLists.txt
	src/cpp/CMakeLists.txt

This commit contains part of the GSoC 2011 work of Nick Vanbaelen
who added multithreaded search support in FLANN using Intel's TBB.

The GPU kd-tree was implemented by Andreas as part of
GSoC 2011. Thanks Andreas!