Added extension credits
Merge pull request #7 from wmde/add_extensioncredits

Added extension credits
Use new version of data-model/javascript
Merge branch 'master' of git://github.com/wmde/WikibaseSerializationJavaScript
Untangled ResourceLoader modules
Reflect contributors
Extracted MultilingualUnserializer from EntityUnserializer
Updated README
Extracted ClaimsUnserializer from EntityUnserializer
Added Serializer QUnit tests
Added Unserializer QUnit tests
Added SerializerFactory QUnit tests
Added EntityUnserializer QUnit tests
Added ClaimUnserializer
Slimmed down ClaimsUnserializer tests
Registered ClaimUnserializer to SerializerFactory
Added SnakListUnserializer
Added ReferenceUnserializer
Added EntityIdUnserializer
Added SnakUnserializer