Tdf.templateuploadcenter

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- Add a function for search and display the compatibility from the indexes of
the portal_catalog [Andreas Mantke]
- Add an optional field to give users an information how to search for older
versions, if they are removed from the compatibility list in the tupcenter.py
[Andreas Mantke]
- Update localization template and localization into German. [Andreas Mantke]

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- Added a workflow for template projects [Andreas Mantke]
- Update of the localization to German. [Andreas Mantke]
- Marked some message strings as utf-8. [Andreas Mantke]

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- Added download links for unstable release files to the project view, which
are displayed, if there is no stable release [Andreas Mantke]
- Add an information about the current status to the message for
the project manager, send for changing the workflow state. [Andreas Mantke]
- Fixed a few localization issues in the views of tuprelease and
tupreleaselink and updated localization template file and
localization into German. [Andreas Mantke}

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- Adding a function to collect the latest unstable release and a slot in
the project view to present such releases to the user [Andreas Mantke]
- Updated string format handling to modern method in tupcenter.py
and tupproject.py [Andreas Mantke]
- Add a function for search and display the license from the indexes of
the portal_catalog [Andreas Mantke]
- Update of the German localization [Andreas Mantke]

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- Heading for release details and changelog will be hidden in the view
tupreleases and tupreleaselink view, if there is no content for this
topics [Andreas Mantke]
- Add a further explanation for publishing a release and linked release
and a link to the advanced state change. [Andreas Mantke]
- Update versions of LibreOffice [Andreas Mantke]
- Update of the internationalization template and the po-file and localilization for the
German language [Andreas Mantke]

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- Fixed a Tal-expression in the views of release and linked release [Andreas Mantke].