Add whitespace test
Not using testem anymore
Tests around getRelationship
Replaced mocha-test with mocha-hack in hack we trust. Renamed createRelationship/deleteRelationship to linkTopic/unlinkTopic. Refactored create topic to use topicnetGraph
Fix errors: createdTopic not accessible
Refactored get topic method to use topicnet graph
Refactored deleteTopic to use topicnet graph
Restructured topic service tests. Refactored search method to use topicnet graph