Updated tripod tables to handle modifiers and values

Added ability to pass in modifiers against a field to the table specs: "modifiers": [{"join": {"glue":" "}},{"lowerCase":{}}] - this will run through the modifiers it finds and alter the data out of the back of it.
Also added ability to have: "value": "_link_:_user_" - this will create a link for the user based on the ID of the tablespec document - it is handled in a similar way in the search documents delegate.