Merge branch 'master' of github.com:lucaswerkmeister/wp_geohashing
Merge branch 'master' of github.com:lucaswerkmeister/wp_geohashing
Now calculating the Geohash myself, which fixes #5. DJIA is cached.

MD5 is calculated using a part of the BouncyCastle project (license included).
Added a DJIA Cache Size option.

Default is 7.