how-to-PR.md

1. Put the bibtex in awesome-Visual-Place-Recognition/citations/<YOUR-PROJECT>.txt.
2. Modify the README.md and follow the format - [TITLE](link to paper), AUTHOR, CONFERENCE YEAR | github | bibtex. For example:

• NetVLAD: CNN architecture for weakly supervised place recognition, Relja Arandjelović et al., CVPR 2016 | github | bibtex