Wrapping previously global things in a context struct, un-flaking tests

mostly by removing a no-op script that only gets ignored sometimes, and
won't be valid in the future I want...
Using a custom FlagSet and testing ServerMain for bonus points
Merge pull request #70 from modcloth-labs/goodbye-globals-and-flaky-tests

Wrapping previously global things in a context struct, un-flaking tests