A trailing / redirects correctly.
Ensure REPL will start with compilation errors.

Add some gymnastics to make sure we can get the REPL up even with errors
in our code.
Display property code under properties table.
Make programmeId mandatory for creation of new projects.
Decassandraify empty values as nils.
Fix hourly rollups.
Remove outdated om/read from side navigation.
Add properties tab and display list of properties.
Tidy up.
Select/deselect properties.
Attempt at DataTables.
Use typeahead and accordion.
Add panel for charting.