add tests for Entanglements
add Entanglements.js
add Entanglement initializer
add Entanglement constructors
add creation methods to Entanglements
add accessing methods to Entanglements
add entangling methods to Entanglements
add BuildSpec augmentation as part of entangled morph creation
add EntanglementInspector
add Entanglement creation to BuildSpec objects