Issues are normally merged into master, but this time the purpose of
issue 147 is to release a small increment from 1.1, so it made more
sense to start from tag 1.1 on stable and to merge it back there.
I will then merge back into master so that master has all the latest
changes.

If I had merged into master first and then into stable, stable would
have received all the other changes from master, which I don't want
yet. This is a minor release which adds no new feature except
compatibility with GHC 7.10.