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.
Cherry-pick from create-parser-of-constraints
Fix parsing of parameters with nowiki tag
Fix template scanner to properly parse nowiki tags
Merge branch 'master' of https://github.com/Wikidata/Wikidata-Toolkit into serialization-of-constraints
Change in package structure.
Speedtest.
Fix scanning of templates with nowiki tags
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.
Merge branch 'master' of https://github.com/Wikidata/Wikidata-Toolkit into serialization-of-constraints
Rename methods to have more descriptive names
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!