Create very basic class to build graphql query string

[jlward]

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[jlward]

Right now, the Query class takes the query parameters in __init__ and uses __str__ to render the query (using string manipulation). Ideally, we use __init__ to store info about the query, make a new method that takes kwargs and builds the graphql query string. This way we can do things like tell the query to be pretty printed, etc. Also, we probably ought to build a tool that takes the kwargs and deals with wrapping formatting. Doing this as a single string format feels dirty.