Add global configuration object

[mjclawar]

Description

For authentication, we currently have API_CREDENTIALS object which can be updated with authentication.authenticate_to_api. However, it would be nice to be able to specify a max timeout for an application globally instead of for each API call. This could be achieved potentially by adding a new object, _STRATODEM_API_CONFIG, which has entries for timeout (and potentially headers, or other configuration), then adding methods such as configuration.set_default_timeout that modify this object, which would be used as default if a user did not pass in a method-specific timeout.

User Story

As an API user with many queries, I want to be able to set a timeout for all of my queries at once instead of adding a keyword argument to each individually.