add convenience-list of all default types
enable IShortName behavior for all types
add tests and upgrade-step for IShortName
add failing test
add Changenote and improve wording in @@pac_installer
fix upgrade-step
Merge pull request #144 from plone/shortname-again

Add Shortname behavior
Merge branch 'issue-142-keep-ftis'
reuse convenience-list DEFAULT_TYPES