Update setup.md: Fixed namespace in AppKernel::registerBundles
Example code had a wrong variable in docs
Added multiple relation setting.
Added documentation for multiple setting.
Added check for empty arrays which don't define new mapping.
Added fix for object mapping without any properties.
Fixed mapping tests to only check for subset values.
Closes #30.
Merge pull request #25 from aivsev/Docs_fixes

Docs fixed
Merge pull request #2 from waibelp/master

Update setup.md: Fixed namespace in AppKernel::registerBundles
Merge pull request #28 from Zylius/relation_types

Added relation types for objects.
Added missing exception for invalid repository.