Merge pull request #171 from stopfstedt/rb2.3

bugfix: only show clerkshipmodel node in the export if the information i...
Merge pull request #173 from stopfstedt/rb2.3

updated changelog for v2.3.0 release.
Merge pull request #175 from stopfstedt/rb2.3

added /static to the list of directories that the web server must be abl...