Use plone.batching.
Make next release be 1.1.0

Also make README show that for Plone 4.2.x p.a.q version < 1.1.0 should be used.
This was discussed with Eric Steele in https://github.com/plone/plone.app.querystring/pull/15
Merge pull request #15 from khink/master

Use plone.batching