This PR adds `{.async: (raises).}` annotations to the pubsub package.
The cases in which a `raises:[CatchableError]` was added were due to not
being part of the package and should probably be changed in a separate
PR
* adding raises defect across the codebase
* use unittest2
* add windows deps caching
* update mingw link
* die on failed peerinfo initialization
* use result.expect instead of get
* use expect more consistently and rework inits
* use expect more consistently
* throw on missing public key
* remove unused closure annotation
* merge master
* add floodPublish test
* test delivery via control Iwant/have mechanics
* fix issues in control, and add testing
* fix possible backoff issue with pruned routine overriding it
