Add API for accessing PhenCards and its data

[jimhavrilla]

I'd like to use GraphQL...seems to be quite popular in the devops community.
https://graphql.org/code/#python

[jimhavrilla]

For now, I am doing this with RESTful API. It is working pretty well, and is super fast to implement. I will make this more of a long term goal, but has already begun to be implemented in PR #112