Remove interfaces for ConnectionListener from Handler
Add listener collection and interfaces to GerritConnection class
Remove listener collection and interfaces from GerritHandler class
Fix Javadoc comment
Fix tests for gerrit-events
Implement new connection listener solution to gerrit-trigger
Literally changed README to markdown

Pun intended, see https://github.com/jenkinsci/literate-plugin
Fixed license formatting
Merge pull request #83 from rinrinne/connection-handler

Move the list of ConnectionListener from GerritHandler to GerritConnection