Update avion_info() to match Avi-on API

[antsar]

Avi-on has changed their API in a way that breaks avion.avion_info() (see #7). This PR updates avion.avion_info() to use the new API.

I have tested the new code against Home Assistant to ensure that it maintains compatibility. Currently, Home Assistant fails get the list of devices. With this PR, it works again. No changes are needed on the Home Assistant side except for a version bump. I can open that PR as soon as a new version of python-avion is on PyPI.

This PR fixes issue #7.

Note: This PR also includes the dependency fix from #6. That change is also required for this library to continue working with Home Assistant.

Output of avion_info() with this PR

The output matches the previous format as far as I can tell (based on Home Assistant code).

{'locations': [{'location': {'address': None,
    'avid': 1,
    'city': None,
    'country': None,
    'created_at': '2017-02-12T03:24:01+00:00',
    'devices': [{'device': {'avid': REDACTED,
       'countdown': None,
       'created_at': '2017-03-20T14:32:35+00:00',
       'current_version': '1.1.2',
       'device': None,
       'favorite': None,
       'friendly_mac_address': 'REDACTED',
       'group': None,
       'groups': [],
       'id': REDACTED,
       'last_active_at': None,
       'location_id': REDACTED,
       'mac_address': 'REDACTED',
       'mesh_status': 'available',
       'name': 'Kitchen Sink Light',
       'pid': 'REDACTED',
       'product': {'configurations': None,
         'deprecated': False,
         'features': ['ON_OFF', 'CLOCK', 'SCHEDULING', 'SCHEDULING_V2', 'SCENES', 'GROUPING', 'GROUPING_V2', 'POWER_CYCLE_OTA'],
         'firmware': {},
         'id': 6,
         'micro_controllers': 1,
         'name': 'GE Plug In Switch',
         'product_code': 5,
         'thumbnail': None,
         'vendor_code': 2,
         'vendor_id': 2,
         'vendor_name': 'JASCO'},
       'product_id': 6,
       'properties': [{'humanized': 'off',
         'id': REDACTED,
         'name': 'on_off',
         'operable': 'device',
         'operable_id': REDACTED,
         'updated_at': '2017-03-20T14:32:35+00:00',
         'value': '[0]'}],
       'remote_status': None,
       'schedules': [],
       'ssid': None,
       'target_id': None,
       'target_type': None,
       'thumbnail': '',
       'type': 'device',
       'updated_at': '2018-05-25T04:19:39+00:00',
       'versions': ['1.1.2']}}],
    'dst': 3600,
    'full_address': None,
    'id': REDACTED,
    'latest_version': '1.8.1',
    'latitude': None,
    'longitude': None,
    'merged_at': '2018-06-04T00:12:02+00:00',
    'merged_up': 'REDACTED',
    'name': 'Default Location',
    'passphrase': 'REDACTED',
    'pid': REDACTED,
    'regenerated_at': '2018-01-16T12:17:33+00:00',
    'state': None,
    'timezone': -14400,
    'updated_at': '2018-04-27T02:41:54+00:00'}}]}

[mjg59]

Sorry about the delay, I've merged this now