User locations module checks if a location is preferrable.

Updated the user_locations module so that it checks if a location is preferable.

If preferable:
<li> gains class ls-ui-comp-userLocations-preferable
Action <a/> (the star) is appended to the dom

If not-preferable:
<li> gains class ls-ui-comp-userLocations-preferable
Action <a/> (the star) is not appended to the dom

The example page has been updated with some locations that are not preferable (roads and non-domestic).
http://localhost:9001/example/user_locations/