Make serialization support lists of Any and maps whose value type is Any.
Merge pull request #126 from fedeoasi/list-map-any-pr

Make serialization support List[Any] and Map[String, Any]
Add custom key serializer to formats. It will be used to serialize/deserialize custom map keys into Strings to be compatible with the JSON specification.
Modify Extraction to serialize/deserialize map keys other than Strings.

* Default support for different types of integers (long, short, int, java versions of those), symbols, and dates
* Use custom key serializers when none of the above types apply
* Test coverage/examples in MapSerializationExamples
Merge pull request #129 from fedeoasi/map-custom-keys

Support maps with arbitrary keys (other than String)
Adds UUIDSerializer to ext
Merge pull request #130 from iwein/feature/uuid-serializer

Adds UUIDSerializer to ext
Merge from master and fix conflict in Formats.scala.
Refactor addKeySerializer in Formats to use the equivalent copy method.
Merge pull request #133 from fedeoasi/scala_2.10_master

Merge master into scala_2.10