Parallel circusctl watcher restarts using wildcards

This pull requests references #814 and somehow #776.

Since our projects are growing we really need the posibility to group watchers together. We found the solution using wildcards the easiest for now.

The best solution for us would be for eg. a tagging system where we can restart watchers by tag.

However, this pull request is quiet dirty. Someone who is more handy with circus and tornado have to decide what to do with it.
We are really looking forward to get such a functionality in the main branch.