Use package maintainer groups
Use package maintainer groups

* Add to pckage maintainer group when creating a new package
* When doing a bulk import, every user who has uploaded a package
  goes into that package's maintainer group
* Uploading a new version of an existing package requires memebership
  in the package maintainer group
* Uploading documentation for a package requires membership in the
  package maintainer group



edsko/hackage-server,agrafix/hackage-server,erantapaa/hackage-server,ocharles/hackage-server,grayjay/hackage-server,grayjay/hackage-server,chrisdotcode/hackage-server,edsko/hackage-server,tkvogt/hackage-server,ocharles/hackage-server,erantapaa/hackage-server,haskell-infra/hackage-server,chrisdotcode/hackage-server,dzackgarza/hackage-server,agrafix/hackage-server,tkvogt/hackage-server,snoyberg/hackage-server,snoyberg/hackage-server,dzackgarza/hackage-server