Proof-of-concept implementation for setting docProperties in templates.
Create helper class to create documents from templates.
Add tests for doc property adapters.
Add tests for creating templates from word-files.
Add a registry setting to disbale/enable doc-properties from templates.
DocProps: Make IDocProperties adapt the newly created document

instead of the containing dossier, and set doc properties *after*
creating the new document, so the document can provide metadata
about itself.
DocProperties: Also provide ReferenceNumber and SequenceNumber for document.
Merge pull request #257 from 4teamwork/lg-doc-properties

Implementation for setting docProperties in templates.
Preparing release 3.3
Merge tag '3.3' into rework-mandanten-concept

Tagging 3.3

Conflicts:
	opengever/dossier/tests/test_templatedossier.py
	opengever/dossier/upgrades/configure.zcml
	sources.cfg