a whole load of stuff to add measurements. Still can't add actual values yet. Almost! #2
create a new parameter if requested to
basic add of parameters - if not new tests
finish off user add form, detail view first pass
add click through to detail on map
tidy up add form
tweak detail form to add source if present.
Merge pull request #35 from openwater/feature/obs-rows

Basic adding of new measurements, new params, new tests!