Fixed value transformer mappers to use mappers internally
Fixed HYDSPerson not checking for homepage property.
Fixed indentation
Fixed typed mapper returning nil

When the inner mapper returns a non-fatal error.
Fixed RFC3339 constant.
WIP: added reflective mapper.

Supports introspection into ObjC Classes to
determine the mapping required for HYDObjectMapper.

- Added some descriptions for debug ability.
Added basic descriptions to mappers.