Settings / updated default URL of OSM import.

Has been changed in download.geofabrik.de.
Places / fixed bug where a search for ID was returning a list of list.

http://sentry.oucs.ox.ac.uk/mobile-oxford/mobile-oxford-api/group/58629/
Places / better handling of errors in tasks (will not try to process file if it has not been downloaded).
Merge branch 'master' into api-browser

* master:
  Places / better handling of errors in tasks (will not try to process file if it has not been downloaded).
  Places / fixed bug where a search for ID was returning a list of list.
  Settings / updated default URL of OSM import.
Use request.path rather than hardcoded string.