adding a new attribute to users so that we can track if they've seen the QB informational modal and wiring up the modal on the frontend.

add the ability to load up a dashboard with the `?add=<card_id>` query string to start in edit mode and add the specified card to the dashboard.

DeCLOBify Field descriptions 

update QB save modal so that we can offer the choice of "create new" or "save over existing" when the user is saving a card that was started from another card.

Unit tests for filtering datetime column against `nil` 

Was pointing to old location `metabase-init`

Backport various improvements from BigQuery driver branch 

update the basic urls and make sure the QB still loads.  we are also going to redirect /card/:id -> /q/:id now.

Fix broken visualization menu

second batch of updates from 0.14.1

Fix dupe fks

fix issue with absolutely positioned empty state messaging

Sort fixes