DbSchemaStorage::set()
Wrap Doctrine exceptions
Renamed Database namespaces and classes
Removed useless imports
Documentation
Auto-creation of the directory in MultipleFileStorage
JSON decode to array instead of stdClass
MapStorage doesn't extend Storage + introduced Transformers
Merge pull request #2 from mnapoli/separated-interfaces

MapStorage doesn't extend Storage + introduced Transformers
Merge branch 'master' into feature/db
#3 MapStorage is Traversable
Merge branch 'master' into feature/db
Updated the Database implementations following the interface changes