Add a new module to display charge status of a Tesla

[drwahl]

This module will use the Tesla API to display the charge information for your Tesla vehicle.

[terminalmage]

This breaks CI because Travis doesn't have the tesla_api module installed. It should probably be gated in some way and then an error raised if you try to use the module without tesla_api installed. Or the import could be moved into an init() function.

@enkore What are your thoughts on this?

[enkore]

See https://i3pystatus.readthedocs.io/en/latest/module.html#handling-dependencies

You'd just need to add "tesla_api" to MOCK_MODULES in docs/conf.py

[enkore]

The future is naow.