Add extra visibility options for GPS traces, and enhance the API call

that returns trace data to return more information if the owner of the
trace has allowed it. Based on a patch from Matt Amos.

test/fixtures/gps_points.yml

@@ -9,3 +9,27 @@ first_trace_1:
   timestamp: "2008-10-01 10:10:10"
   tile: <%= QuadTile.tile_for_point(1, 1) %>
   
+trackable_trace_1:
+  trackid: 1
+  latitude: <%= (51.510 * SCALE).to_i %>
+  longitude: <%= (-0.140 * SCALE).to_i %>
+  gpx_id: 3
+  timestamp: "2009-07-30 17:46:00"
+  tile: <%= QuadTile.tile_for_point(51.510, -0.140) %>
+
+trackable_trace_2:
+  trackid: 2
+  latitude: <%= (51.511 * SCALE).to_i %>
+  longitude: <%= (-0.141 * SCALE).to_i %>
+  gpx_id: 3
+  timestamp: "2009-07-30 17:47:00"
+  tile: <%= QuadTile.tile_for_point(51.511, -0.141) %>
+
+identifiable_trace_1:
+  trackid: 1
+  latitude: <%= (51.512 * SCALE).to_i %>
+  longitude: <%= (0.142 * SCALE).to_i %>
+  gpx_id: 4
+  timestamp: "2009-07-30 17:46:00"
+  tile: <%= QuadTile.tile_for_point(51.512, 0.142) %>
+

test/fixtures/gpx_files.yml

@@ -7,7 +7,7 @@ public_trace_file:
   latitude: 1
   longitude: 1
   timestamp: "2008-10-29 10:10:10"
-  public: true
+  visibility: "public"
   description: This is a trace
   inserted: true
   
@@ -20,6 +20,32 @@ anon_trace_file:
   latitude: 51.3
   longitude: -0.56
   timestamp: "2009-05-06 13:34:34"
-  public: false
+  visibility: "private"
   description: This is an anonymous trace
   inserted: true
+
+trackable_trace_file:
+  id: 3
+  user_id: 2
+  visible: false
+  name: Trackable Trace.gpx
+  size: 123
+  latitude: 51.51
+  longitude: -0.14
+  timestamp: "2009-07-30 17:48:34"
+  visibility: "trackable"
+  description: This trace shows trksegs and timestamps, but no user details.
+  inserted: true
+
+identifiable_trace_file:
+  id: 4
+  user_id: 2
+  visible: false
+  name: Identifiable Trace.gpx
+  size: 123
+  latitude: 51.512
+  longitude: 0.142
+  timestamp: "2009-07-30 17:48:34"
+  visibility: "identifiable"
+  description: This trace shows trksegs, timestamps and user details.
+  inserted: true