Multi-owner root auth used for wiring up system contracts. Same ABI as warded contracts in MakerDAO system, but mind the return type of
auth modifier replaced with
ward() internal explicit check. Events and errors are new.
We might make small changes as the compiler keeps improving. Git submodules are great, you should try using them. All of the problems with submodules are actually features. Let us know if you want us to tag a commit.