Add dexterity support.
Merge pull request #23 from 4teamwork/jone-dexterity

Add dexterity support.
Fix markup in templates.
Fix translation conflicts.
Update German translations.
Add French translations.
Add English translations.
Merge pull request #22 from 4teamwork/jone-translations

Update translations
Cleanup (indenting, whitespace, pep8, pyflakes).
Use ftw.testbrowser in participants browser tests.
Extend participants view browser tests.
Make participants view available for normal users.

The view removes the management UI (invite / remove participants) when the user has not enough privileges.
The link to the participants view is still protected, a link can be placed on integration level when needed.
Merge pull request #24 from 4teamwork/jone-participants-readonly

Make participants view available for normal users.
Preparing release 1.2.0
Back to development: 1.2.1
Merge branch 'master' into tt-mail

Conflicts:
	ftw/participation/browser/accept.py
	ftw/participation/tests/test_browser_participants.py