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
Back to development: 3.3.1
Dropped diverse packages out of the `development-packages`.

The packages are now released and part of the newest gever release (2.8).
Dropped version pining in test configuration, and use latest version as default.
Refactored some hard to change test data.
Merge pull request #275 from 4teamwork/pg_release_28_cleanup

Dropped packages out of the `development-packages`.
Merge pull request #276 from 4teamwork/lg-refactor-hard-to-change-test-data

Refactor some hard to change test data.
Document: Refactor behaviors to be a package with separate modules.
Cleanup: Docstrings, spelling.
Add assertion to nonsensical test.
WIP: Extract document metadata into separate behavior.