Fix html rendering docs

So CLICommand have grown a create_help_command which looks like
it was added with the doc changes a while back.

Also htmlgen is reaching into the service_command for a
'_service_object' which needs to be fixed in a more long term way,
but for the time being I just added a hasattr check so we can
render docs.
Remove all references to easy_install in our docs

pip is accepted as the standard way to install python
packages.
Link to pip installer
Merge branch 'docs-html-fix' into develop

* docs-html-fix:
  Link to pip installer
  Remove all references to easy_install in our docs
  Fix html rendering docs