Puts together a randomized short story that may even make sense in attempting to explain an agency's reasoning for a mission contract.

Parameters

contractType
agency	The name of the agency offering the contract
topic	A string for a 'topic' that will be directly substituted in facts and other fields that mention it. Singular noun please.
subject	A string containing the subject matter at hand (usually a destination like a Celestial Body, Orbit, Srf, see StoryDefs.cfg for examples)
seed	A seed number, for retrieving the exact same string again when needed (mind the string parameters must also be the same)
allowGenericIntroduction
allowGenericProblem
allowGenericConclusion

Returns

A string telling the story, no guarantees on it making much sense.