New extension proposal (geohash)

Hi, I'd like to propose a new extension named geohash, that brings geohash encoding and decoding functionality. There is a significant performance gain from using this extension compared to user-land libraries. The extension is licensed under the BSD licence. I would like to submit the geohash extension into the PECL directory. Source code is available at https://github.com/emirb/php-geohash-ext Best, Emir Beganovic