[BUGFIX] Allow negative coordinates

The world is more than just the part east of the prime meridian and
north of the equator 



This allows deeplinks to have negative coordinates. Also fixes the
coordinate picker when selecting coordinates with negative values.

Signed-off-by: Felix Kaechele <felix@kaechele.ca>

lib/utils/router.js

@@ -85,7 +85,7 @@ define(['Navigo'], function (Navigo) {
     var router = new Navigo(null, true);
 
     router
-      .on(/^\/?#?\/([\w]{2})?\/?(map|graph)?\/?([a-f\d]{12})?([a-f\d\-]{25})?\/?(?:(\d+)\/([\d.]+)\/([\d.]+))?$/, customRoute)
+      .on(/^\/?#?\/([\w]{2})?\/?(map|graph)?\/?([a-f\d]{12})?([a-f\d\-]{25})?\/?(?:(\d+)\/(-?[\d.]+)\/(-?[\d.]+))?$/, customRoute)
       .on({
         '*': function () {
           router.fullUrl();