ConfigureMainBranch has the user to confgure the main branch.

ConfigurePerennialBranches has the user to confgure the perennial branches.

EnsureIsConfigured has the user to confgure the main branch and perennial branches if needed.

EnsureKnowsParentBranches asserts that the entire ancestry for all given branches is known to Git Town.

GetSquashCommitAuthor gets the author of the supplied branch.