Created eligibility service to determine if notification should be sent
Changed event type used in filters to work for pull request merges too
Added eligibility filter chain to PostReceiveHook
Added EligibilityFilterChain to MergeListener
Added IGNORE_COMMITTERS contsant to Notifier
Added ignore committers field to UI template
Added component setup in atlassian-plugin
Renamed plugin to "Stash Webhook to Jenkins"