Add "repository.create" and "repository.query" methods to Conduit
Summary: Primarily for @csilvers who has 92 million repositories or something. This is a touch hacky, but movitated by pragmatism.
Test Plan:
- Ran "repository.create" to create repositories, "repository.query" to list them.
- Tested most or maybe all of the error conditions, probably.
Reviewers: btrahan, vrana, csilvers
Reviewed By: csilvers
CC: aran
Differential Revision: https://secure.phabricator.com/D2396