Add basic support for Union types. Solves #3#4

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Astn wants to merge 2 commits intonelson-ai:masterfrom athlinks:AddBasicUnionSupport

+300-11

Commits on Feb 23, 2017

Add basic support for Union types.
Astn
committed

Commits on Feb 24, 2017

Added a test for getUnionIri
Astn
committed