Plone 4.3.4: map "Edit comments" permission to "edit" action group.
Split up example workflow into a Plone 4.2 version and a 4.3 version.

The "Edit comments" version was added in 4.3.x.
In order to get the tests to pass in both version, we need two distinct definition.xml's.
Merge pull request #55 from 4teamwork/jone-plone43-edit-comments

Plone 4.3.4: map "Edit comments" permission to "edit" action group