Schoology Plugin

[DrLynch]

At present the roster information is pulled in entirely from Google Classroom using the code in rosters.py. In order to collaborate with schools using Schoology we will need to build an analogue to that using the appropriate API. Addressing this feature will require:

1. Identifying the basic requirements for Schoology access.
2. Building a test case, preferably using open standards.
3. Implementing a basic wrapper with configuration.