Py-synology

- added ability to take snapshot and download specific snapshot (by chibani)

- added support to get and set home mode (by connor9)
- added support to enable/disable camera (by alekslyse)
- fixed lint error (by einarhauks)

We'll now auto renew session when we get session expired response during any API calls

Detail can be seen here: https://github.com/snjoetw/py-synology/issues/1

Detail can be seen here: https://github.com/snjoetw/py-synology/issues/1