Fix broken download links, and improve Mac MPS support

• Allow running vanilla NetVLAD
• Smaller fixes
• Allow setting posDistThr

Training code

This release adds code to train NetVLAD on the Mapillary dataset + PCAing models using either Mapillary dataset or Pittsburgh (https://github.com/QVPR/Patch-NetVLAD/pull/20 and https://github.com/QVPR/Patch-NetVLAD/pull/39)

Bugfixes

• Support for Multi-GPU inference (https://github.com/QVPR/Patch-NetVLAD/pull/22 - thanks @michaelschleiss)
• Fix in keypoint positions (https://github.com/QVPR/Patch-NetVLAD/commit/6005b555cf05414afac3f3c0203e22a249d05b91)
• Fix recalls when validating on Mapillary dataset (https://github.com/QVPR/Patch-NetVLAD/pull/44)

Full Changelog: https://github.com/QVPR/Patch-NetVLAD/compare/v0.1.5...v0.1.6

Add real-time script and fix some bugs.

Detect number of clusters automatically

Fixes for pip/conda release (missing dependency on matplotlib and wrong entry point for download model executable)

Initial release of Patch-NetVLAD. Used as release for first PyPi/Conda packages.