Add PGVertica (#18)

README.md

@@ -21,6 +21,7 @@ Contributions are welcome. Please take a look at the [contribution guidelines](C
 
 ## Tools
  - [d2l](https://github.com/marco-the-sane/d2l) - Infer table DDL from csv-like files.
+ - [PGVertica](https://github.com/ZbigniewTomanek/pgvertica) - Proxy server to connect from BI tools using PostgreSQL connectors
  - [verticaextractor](https://github.com/joeygibson/verticaextractor) - Extract data from tables and write native binary files.
  - [verticareader](https://github.com/joeygibson/verticareader) - Convert native binary files to CSV files.
  - [verticat](https://github.com/joeygibson/verticat) - Count the rows, and take rows from native binary files.