Added 4 basic locations associated with the Penarth and Risca trails listed in the landamrk submission form. Moved said forms javascript to a seperate file

cleared code, made addLocations element name easier to distinguish, fixed bug with landamrk form not defaulting to select location/trail disabled selection dropdown option by default

Increased box-size of description input to match the 200 word limit, asdjusted form-width to compensate