Fix for Ticket #1387 - Swapped Geotag Data

In application/controllers/scheduler/s_twitter.php in line 133, you will see:
```
  if ($tweet->{'coordinates'} != null)
                            {
                                    $tweet_lat = $tweet->{'coordinates'}->coordinates[0];
                                    $tweet_lon = $tweet->{'coordinates'}->coordinates[1];
                            }
```
This generates the swapped geotag data referenced in [Issue #1387](https://github.com/ushahidi/Ushahidi_Web/issues/1387) submitted by @j73wa.

I swapped the indices (changed the 0 to 1 and vice versa) so that the latitude and longitude data will be mapped correctly.