Add Filtering and Fix 'doc_ID' Generation
Add Filtering and Fix 'doc_ID' Generation

-Add code to handle filtering on received/published envelops

-Update to set the 'create_timestamp', 'update_timestamp' and 'node_timestamp'
to same time when the envelop is received/published

-Generate an 'doc_ID' if none is provided and ensure that 'doc_ID' is the same
as couchDB _id

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