added distance calculation from location

src/main/java/de/anxietyprime/swajodel/Routes.java

@@ -51,7 +51,10 @@ public class Routes {
                         posts
                       WHERE
                         deleted IS NULL
-                        AND sqrt(power(postlocation[0] - (?), 2) + power(postlocation[1] - (?), 2)) <= 10
+                        AND AND earth_distance(
+                                        ll_to_earth(posts.postlocation[0], posts.postlocation[1]),
+                                        ll_to_earth((?), (?))
+                                      ) <= 10000
                         AND posts.id NOT IN (SELECT child FROM comments)
                       UNION
                       SELECT