Improve Readme?

[jakepenn]

Hey! I'm interesting in sending graphql queries from C++ -- currently I'm storing the queries as multiline strings, but it's a pain cause I have no way to mutate the string to change the responses during runtime, kind of defeating a bit the point of graphql cause I need to save every possible query configuration and call the correct one at runtime.

Does this library help with generating queries and runtime, and if so is there a good example around, struggling to see from the readme how this would be possible.