Enforce goimports, add tooling and documentation, and run it on the repo.
Fixes https://github.com/certusone/wormhole/issues/305 The logic to do this seemingly simple task is hilariously complex due to the version string being attacker-controlled. Change-Id: Ia1758418a67c082595affe0b7f2bb801e9434733
Calling guardiand a bridge dates back to v1 and no longer makes sense. Change-Id: I27d24a5d7a64c3e37d6a5ce9c402c6248ad9c59e
tbjump
Leo