Removed all non-completed events
Merge branch 'dendwrite' of https://github.com/hackerhouse/provenance into dendwrite

* 'dendwrite' of https://github.com/hackerhouse/provenance:
  screencapture + html from bg
  added tabid and frameid to onCompleted
  post-process nodes after collector, combine with content.js ctx
  error handling if chrome ext permissions denied
  adding back content script to capture page ctx/html

Conflicts:
	app/js/collector.js
Readded onCreatedNavigationTarget listener
Merge branch 'dendwrite' of https://github.com/hackerhouse/provenance into dendwrite

* 'dendwrite' of https://github.com/hackerhouse/provenance:
  added front end experiment, db logic, removed unnecessary components from backend
  added new file
  adjusted front end db
  set up front end.