public function update(Request $request, $id)
 {
     $model = MasterProof::findOrFail($id);
     $rules = str_replace(':id', $id, MasterProof::$rules);
     $rules = str_replace(':id', $id, $rules);
     $validator = Validator::make($data = $request->all(), $rules);
     if ($validator->fails()) {
         return Redirect::back()->withErrors($validator)->withInput();
     }
     $model->update($data);
     return Redirect::route($this->route . 'index')->with('alert-success', 'Data has been Updated!');
 }