Merge tag '0.3.2' into develop

Hare now makes multiple connection attempts.

* tag '0.3.2':
  Bump version.
Update read me.
Remove Spring.
Tweak the way exchanges are discovered.
Bump version to v0.3.3. Add changelog.
Merge remote-tracking branch 'origin/develop' into develop

* origin/develop:
  Added prerequisites to readme.