Merge branch 'model/concept' into development
Create reference: concept A -[contains]-> concept B
Install neoid
Config neoid
Install neo4j
Add test server for neo4j as symlink
Add neo4j tasks for the testing server
Merge branch 'neo4j/add' into development
Add inverse relationship for :contains, allow sub_concepts to find its bas_concept
Remove Contain and Relates model, start over
Add neo4j db matcher
Refactor Concept model's test
Add matcher to support relationship-type models
Add test for Contains model
Create model Contains
Adjust model Concept so it can be used with Contains model
Add comment to clarify Contains factories
Allow sub_concepts and base_concepts of a concept to be queried
Update tests for Concept model
Refactor Concept model 's test