Inbound DID Import

- Fixed the endpoint override.  Resolves https://git.flyball.co/dsiprouter/enterprise/issues/72
- Placed the sample CSV template into the proper diretory so that it could be downloaded

gui/static/template/DID_example.csv

@@ -0,0 +1,5 @@
+#DID, EndpointGroupID, Name
+13134860409,52,Inbound1
+13134860410,53,Inbound2
+13134860411,34,Inbound3
+

gui/templates/inboundmapping.html

@@ -454,7 +454,7 @@ <h4 class="modal-title custom_align" id="Heading">Import DID's</h4>
         <select class="gwgroupid form-control" name="gwgroupid" title="gwgroupid">
           <option class="hidden" value="" selected disabled>Override Endpoint Group (Optional)</option>
           {% for epgroup in epgroups %}
-            <option value="{{ epgroup['id'] }}">{{ epgroup['description']|attrFilter('name') }}</option>
+            <option value="#{{ epgroup['id'] }}">{{ epgroup['description']|attrFilter('name') }}</option>
           {% endfor %}
         </select>
       </div>