Initialise packing route
Pin data model
Add local fixtures

As much as I'd like data_model to generate these for us, coaxing it to produce
realistic looking records is proving too time consuming.

Therefore, add local fixtures and bolster the `gulp fixtures` command to
validate and push to Couch.

NB, you can also use:

* `gulp fixtures-local` to push to Couch
* `gulp fixtures-validate` to validate local fixtures against data_model
Add packing list fixtures
Add packing views
Filter child states in nav, add track by optimisation
Add complete status and packed qty
Use complete column as a indicator
Delint
Add max/partial quantity button
Add CouchDB init to readme
Initial navbar spec