wip: getting measurements for selected properties/sensors.
Make series group by type.
Remove sensors that belong to deselected property.
Plot sensors of the same unit only.
Store 'checked' status in app model.
Just the programmes tab now.

This is the least number of changes to get it down to just the
programmes tab.
Finally fixed that broken font.

Serif fonts are fine, but not for headlines on screens. Helvetica will
do for now.
Get rid of scrolling tables.
Header and footer and start of styling.
Sablonification of page.
First cut of breadcrumbs.
Start of links for better navigation.
A nicer container.

I'd really like this to be fluid, but a plain container will work for
now.
Sablonified and changed programmes table.
Better Sablonified Table.

And cleaned up some cruft in the overall layout.
Clean up & remove unneeded functionality.
Fixed reduce-kv and reduced weirdness.

I'm not sure if it is the map sorting or if it is the keyword equality,
or just something in reduce-kv, but this version works and clears down
the lower parts of the URL hierarchy for the page.
Table clearing, history & plurals.
Merge pull request #12 from MastodonC/feature/simpler-programmes-tab

Simplify Programmes Page
cleanup project.clj