Added serializing and deserializing for monolingual text values.
Also: setup work.
Tested MonolingualTextValue
Added support for Labels and Descriptions
Tested aliases.
Streamlined tests.
Added Serializing/Deserializing of ItemIds.
Added SiteLinks
Fixed Typo in class name of "TestItemDocument"
Moved structuram comparision of Json strings in seperate class.
Change in package structure.
Speedtest.
further work on the external JSON serialization.
Added Snaks, tests for novalue- and somevalue snaks
Finished datavalues
Finished first draft of the (de)serialization.
Organized classes in a nicer package structure.
Reduced code replication.
Created a test suite for convenience.
Introduced property (de)serialization
Added further tests and outlinded conversion beween data models.
Added test dump processing.
Enabled Jackson to distinguish between Item- and PropertyDocumentImpl on
its own.
Started integrating JSON dumps into the Dump processing pipeline.
Intermediate commit - nothing fully functional to see here.

Note changes made to existing file for supporting the handling of JSON
dumps!
Pre-merge push of draft implementations of JsonDumpFile and the
appropriate processor.
Merge remote-tracking branch 'origin/master' into externalJsonReader

Conflicts:
	wdtk-datamodel/pom.xml

Merging master for changed handling of interface overridden methods
Post-merge update of implementations where the interface changed.
+ some missing license headers; minor style fixes
Created some new subpackages for better organisation of code
Moved old JSON test to suitable package
Merge branch 'master' into externalJsonReader