some scrubbing changes
added RecordLinkageIT and did some minor bug fixes
added GlobalMatching tests, extended RecordLinkage tests, minor bug fixes
added some helper functions, fixed GM, added threshold for edges to GM
simplified similarity functions, fixed GM match IT
minor refactorings, added test for multivalued embededded relations using all() in meteor queries for entity mapping
'right ' modelling of embedded entities with SetNodes
Refactored EM
Refactored EM
Extracted schema inferencer from correspondence finder
Refactored spicy
Fixed embedded fks
Refactored tree handler