Add a test for permission Acquisition on comments.

We use a different workflow for comments:
The View permission is acquired instead of given explicitly,
as outlined in https://dev.plone.org/ticket/12531.
Move application of custom workflow to test_acquisition.py...

...so it doesn't interfere with other test in the layer.
Revert "Move application of custom workflow to test_acquisition.py..."

This reverts commit 6e9b32254e190201690172c66d9bf2860f9ae80d.
Revert "Add a test for permission Acquisition on comments."

This reverts commit 66d355544fc37ff67a6e4722ee84ad2b6563f766.
Update plone.app.discussion.po

Some translations
Merge pull request #27 from juh2/patch-1

Update plone.app.discussion.po
Update french translation
Preparing release 2.2.6
Back to development: 2.2.7
fix regression

introduced by 702f7e1f1d7c2d50621f2f326c185ddb2034d174
fix deprecation warning
update changelog
add buildout configuration for standalone testing
prevent the viewlet from raising an error for objects that are not annotatable
Update README.rst

Refined confusing info about Plone versions.
Merge pull request #28 from witsch/non-annotatables

fix for non-annotatable objects
Add CHANGES entry for latest pull request merge.
Prepare 2.2.7 release.
Prepare 2.2.8 release.
Use latest bootstrap.