Add missing `\` in gpu Makefile

* Add GpuIndexBinaryFlat
* Add IndexBinaryHNSW

* Fix #558 - Make `d` an integer

* Use int()

Features:

- automatic tracking of C++ references in Python
- non-intel platforms supported -- some functions optimized for ARM
- override nprobe for concurrent searches
- support for floating-point quantizers in binary indexes
Bug fixes:

- no more segfaults in python (I know it's the same as the first feature but it's important!)
- fix GpuIndexIVFFlat issues for float32 with 64 / 128 dims
- fix sharding of flat indexes on GPU with index_cpu_to_gpu_multiple

os.tempnam is eliminated in python3.
Used tempfile.NamedTemporaryFile().name instead.
This is also valid for python2.7.

* Configure script use threaded MKL instead of sequential.

* Do not link against GNU OpenMP when linking against Intel OpenMP.

* Facebook sync

* Update swig wrappers.

* Fix comment.

thanks.

* add a working setup.py

* Rename setup.py to python/setup.py

* Fix paths in setup.py

* Use relative imports for python3 compatibility.

* Add python/install Makefile target.

* Fix test target in Makefile.

* Add TravisCI config.

* Refactors Makefiles and add configure script.

* Give MKL higher priority in configure script.

* Clean up Linux example makefile.inc.

* Cleanup makefile.inc examples.

* Fix python clean Makefile target.

* Regen swig wrappers.

* Remove useless CUDAFLAGS variable.

* Fix python linking flags.

* Separate compile and link phase in python makefile.

* Add macro to look for swig.

* Add CUDA check in configure script.

* Cleanup make depend targets.

* Cleanup CUDA flags.

* Fix linking flags.

* Fix python GPU linking.

* Remove useless flags from python gpu module linking.

* Add check for cuda libs.

* Cleanup GPU targets.

* Clean up test target.

* Add cpu/gpu targets to python makefile.

* Clean up tutorial Makefile.

* Remove stale OS var from example makefiles.

* Clean up cuda example flags.