RB Gateway is now capable of installing post-receive hooks in a

Mercurial repository that will execute rb-gateway trigger-webhooks

with the appropriate arguments to cause a push event to occur.
Some of the integration testing infrastructure has been refactored to be

SCM-neutral. Additionally, a bug was fixed in helpers.CreateTestRepo

that always recorded the repository as a Git repository.

Ran unit tests.
Ran integration tests.
Ran go fmt ./....