Changes to domain model to eliminate redundant links.  Also added
"Aliases" to nodes - to be used in networks where multiple terms will be associated with a node, forming equivalences
Merge branch 'origin/develop'
Added advanced search parsing to findNetworks
The findNetworks method now searches against metadata and metaterm properties
Added additional unit tests to find networks using metadata
Added CRUD operations of metadata to Network service
Added CRUD operations of metaterms to Network service