Copyright 2016-2017 Igal Sapir
This software is licensed under the Lesser GNU General Public License Version 2.1 (or later); you may not use this work except in compliance with the License. You may obtain a copy of the License in the LICENSE file, or at: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.