 
 
Version 1.5
	* new C++ templated API
	* saving/loading of indices to disk
	* threadsafe search
	* new distance types (thanks to Radu Bogdan Rusu and Romain Thibaux for the patch)
	* (api change) autotuned is no longer selected by passing a precision >0, it's used when the algorithm type is set to autotuned
