Documented the 'project' paramter to P4Source.
Changed the description about project parameter
documentation for P4Source, project paramter upated
Add root-relative links to JSON help
remove initctl link from Dockerfile
fix more pyflakes discovered by pyflakes-0.8.1
Merge kporwal/buildbot:fix-2715 (PR #1099)
Merge branch 'master' into nine

Conflicts:
	master/buildbot/status/web/console.py
	master/buildbot/status/web/templates/jsonhelp.html
	master/buildbot/status/web/waterfall.py