Implement API to fetch compiled version
Merge pull request #693 from mgreter/feature/query-compiled-versions

Implement API to fetch compiled version
Incorporate feedback from @QuLogic for latest commits
Don't delay String_Constant's that are name colours

This will allow the eval visitor to correctly coerce the string node
to a color node.
Merge pull request #695 from xzyfer/fix/map-keys-as-colors

Fix colours as map keys