* replace reflection collection type with hash to prevent duplicated associations in some cases
* include tests
* Fix robucup offenses
* Improve test
* Remove usless requirement
* improve tests
* remove custom_options option from Post and InheritedPost serializer
* Improve tests
* update changelog
* update changelog
This is useful to set application-wide default behavior - e.g. in
previous versions of AMS the default behavior was to serialize the
full object graph by default - equivalent to the '**' include tree.
Currently just the global setting, but I think this could also work
on a per-serializer basis, with more attention.
* Move all associations related code from Serializer class to Associations module
* Introduce Reflection class hierarchy
* Introduce Association class
* Rid off Serializer#each_association
* Introduce Serializer#associations enumerator
