Version 0.2.2

Fixes a few bugs, found via clang, and updates the unordered map header

Version 0.2.1

• updated unordered_dense header
• added an iterator interface (supporting for(auto i : ...) loops) for iterating over all of the object instances in the data container and all of the relationships linked via a many link to an object instance.

Version 0.2

Version 0.2 adds a query interface as well as a better interface for vector_pool properties

Version 0.1.1

• added optional links
• added multiple links
• added the color tutorial
• various bug fixes

Version 0.1

The first release of the project, with the first version of the documentation and supporting tests.