Stub for dwellings starts and completes API
Stubbing out the stagecraft module
Copying multi-timeseries-graph to spotlight
Removing graph line labels from this branch

Should still be in residential property. Will remerge once that's stable
and tests are passing
Feature test for lines module
Start lines module based on stacked module
Displaying as a line graph
Reinstate graph-with-labels class
Add missig comma