New maintainers of containers

Hi David and Edward, following the announcement and small discussion at libraries at haskell, I have added you both as maintainers of containers on github and on hackage. The idea is that David will take care of Data.Sequence, and CLC will manage the rest (at least until someone else appears, like wren). I have added only you Edward on behalf of CLC, but you can add others if you like (you should have the rights to do it). I would like to note that since containers are widely used and needed by GHC itself, I consider the CLC to have the final word if any disagreement ever arises between CLC and other container maintainers (David, wren, ...). Also please consider backward compatibility very highly. I will stop reading libraries at haskell and also containers github notifications soon, but feel free to write me an email or mention me on github (using @foxik) if you need to contact me. Cheers, Milan Straka