various bugfixes from github issues
kmean with some frozen centroids
GPU better tiling for large flat datasets
default AVX for vector ops

various bugfixes from github issues
kmean with some frozen centroids
GPU better tiling for large flat datasets
default AVX for vector ops

various bugfixes from github issues
kmean with some frozen centroids
GPU better tiling for large flat datasets
default AVX for vector ops

* fixes for homebrew and anaconda python

* remove #/bin/bash

* PR feedback and handle different versions of LLVM

Accepting this 2-word PR without CLA....

fix index_cpu_to_gpu_multiple

fix PCA dimension

It took me quite some time to get around this error -- it might save others time.

* make INSTALL a proper markdown file

* add clarification to gpu test

* add forgotten parenthesis

- access GPU resources

- all Hamming distances of all sizes supported

- implemented ScalarQuantizer (without IVF)
- implemented update for IndexIVFFlat
- implemented L2 normalization preproc

- implemented ScalarQuantizer (without IVF)
- implemented update for IndexIVFFlat
- implemented L2 normalization preproc

* moved most FAISS_ASSERT calls to C++ exceptions, and adjusted
  memory allocation to avoid mem leaks

* added an IndexIVFScalarQuantizer type that offers an
  intermediate compression between IVFFlat and IVFPQ

* support removal of indices in IndexIDMap / IndexFlat combination

* various fixes in GPU code

  memory allocation to avoid mem leaks

* added an IndexIVFScalarQuantizer type that offers an
  intermediate compression between IVFFlat and IVFPQ

* support removal of indices in IndexIDMap / IndexFlat combination

* various fixes in GPU code

The rootdir in the distribution seems specific to the creators.  I just made the rootdir for the fvecs be the suggested directory (sift1M) from the installation guide.

correct utils::nextHighestPowerOf2