update install doc
Fix the pyenchant not installing issue.
Add docs: how to write custom forms for content types. refs #243
Provide a docker.io development setup

Kudos to @pjstevns for providing the initial solution.
Removed ploneintranet.async (mere example package),
updated collective.celery source to use branch.
Fixing dependency and adding celery config to instance.
Jenkins bootstrap
Add code analysis, coverage, xml test reports
Moving ploneintranet.suite around
simplify travis
Remove some eggs from tests
Update source checkouts

We now have pushurls so that source checkouts are the same on jenkins
and for developers
Only test the suite itself on travis
test dependencies + simplify travis