Pulp

The ansible installer should be removed from the Installer docs . This will allow for two benefits:

1) all users, QE, and test runners all will test the pypi or source installs
2) The ansible installer can be developed more disruptively by not also having to be 100% working all the time

The plan is to collaborate w/ community contributors to improve the ansible playbooks until they are unified and simplified. After pulpcore is at a Beta perhaps dev or QE could also improve the these roles as well.

Per comment 3, this also should combine the source and pypi install sections by:
1. deleting the source install docs
2. having a note that shows pip usage for a source install to install from master on github and from a local checkout