Akips

Add new functions to get device memberships and set manual device grouping memberships.

General code cleanup, documentation, and adding a server time zone option.

Add support for aggregate data function.

Update requirements for python 3.8 and 3.9

This update does the following:

- Adds group filtering options to get_devices
- Adds a new get_series to pull time series data on device counters

Additional device functions