Add knockout-sortable.

package-overrides/github/rniemeyer/knockout-sortable@0.12.0.json

@@ -0,0 +1,15 @@
+{
+    "directories": {
+        "lib": "build"
+    },
+    "main": "knockout-sortable",
+    "dependencies": {
+        "jquery": "github:components/jquery@^2.1.4",
+        "jquery-ui": "github:components/jqueryui@^1.11.4",
+        "knockout": "github:knockout/knockout@^3.3.0"
+    },
+    "map": {
+        "jquery-ui/draggable": "jquery-ui/ui/draggable",
+        "jquery-ui/sortable": "jquery-ui/ui/sortable"
+    }
+}

registry.json

@@ -339,6 +339,7 @@
   "knockout-paging": "npm:knockout-paging",
   "knockout-pre-rendered": "npm:knockout-pre-rendered",
   "knockout-select2": "github:cruikshj/knockout-select2",
+  "knockout-sortable": "github:rniemeyer/knockout-sortable",
   "knockout-validation": "github:Knockout-Contrib/Knockout-Validation",
   "lazy":"npm:lazy.js",
   "leaflet": "github:Leaflet/Leaflet",