* Implement remove_ids in IndexPQ

* Update IndexPQ.cpp

* Remove useless LIBNAME macro in Makefile.

* Add installdirs, install, and uninstall Makefile targets.

* Fix merge.

update faiss.py to enforce less strict check of error message

thanks. Also addresses #392

Not tested but looks legitimate + better than previous state in any case ;-)

* :update Readme to include conda install info

* move to INSTALL.md

* Add C API

* Add installation instructions for the C API

- support on-disk IVF

* Add shared lib target for GPU version.

* Dynamically link tutorial examples.

* Add shared lib to clean target in GPU Makefile.

* Add clean target to tutorial examples Makefile.

* Minor modifications to tutorial GPU examples.

Update Getting started tutorial link.

* Remove transitional print import.

* Add example for multiple GPUs in python.

* Add example on GPU in C++.

* Add example on multiple GPUs in C++.

* Add IVFFlat example on GPU in python.

* Add Makefile for C++ tutorial examples.

* Add IVF index on GPU example in C++.

Add template for issues.

ok

- adding HNSW indexing method

- simultaneous search and reconstruction for IndexIVFPQ

- adding HNSW indexing method

- simultaneous search and reconstruction for IndexIVFPQ

- adding HNSW indexing method

- simultaneous search and reconstruction for IndexIVFPQ

just fixed a typo