Pr66 im bart

This PR extends from #66 and includes:

1. Code style change to camelCase in classes.
2. A presumptuous change @ https://github.com/TomHAnderson/zf-hal/commit/7d1ef097492839a51c1dde575e64c639fdd266d9
2 (cont) The depth counter was failing because it expected an entity.  The createEntityFromMetadata function uses the entity hydrator to extract to an array then build a HalEntity from that array and the extracted id.  I believe only the extracted id is necessary for this function to do it's job and it now uses the same entity passed to the function to build the HalEntity.
3. Corrected inflated depth guage.

@weierophinney @im-bart