- Update to version 7.1.4
* Dumped pysnmpcrypto dependency and bind to cryptography if
presented.
- Update to version 7.1.3
* Fixed a bulkCmd IndexError bug.
* Cleaned up nextCmd/bulkCmd related code.
* Revised docs and examples accordingly.
- Update to version 7.1.2
* Revised v1arch hlapi and its docs/examples.
* Revised nextCmd, bulkCmd, walkCmd, and bulkWalkCmd returned
collections.
* Moved Slim class to v1arch.