Preparing release 1.1.4
Back to development: 1.1.5
Merge branch '1.1.x' and bump master to 1.2.0

Bumped version in master to 1.2.0 after creating 1.1.4 release because
commit 2b8e434 (Remove customization of versions_history_form since
the changes were ported to Products.CMFEditions>2.2.9) introduces a
hard dependency to Products.CMFEditions>2.2.9, which makes it
incompatible with currently released plone versions.