Finalizing Server webUI

Still needed:
- Way to update clients' versions
- Way to delete nodes
- working dashboard
- working search function

Server/routes/nodes.js

@@ -18,6 +18,9 @@ router.post('/:nodeId/systems', nodesController.addNodeSystem);
 // Update a system on an existing node
 router.put('/:nodeId/systems', nodesController.updateNodeSystem);
 
+// Delete a system from an existing node
+router.delete('/:nodeId/systems', nodesController.removeNodeSystem);
+
 // TODO Need to authenticate this request
 /* POST a new node to the server
 *