================
Features
--------
- Users having the role `Administrator` can delete all persons in the
address book or even the whole address book on the address book edit
form.
- Last modification time of objects is now stored and displayed (in
UTC!).
- Users having the role `Administrator` can import data in the master
data area.
- Added ability to enter additional packages names at installation
(e. g. to install a specific import file readers).
- Users having the role `Administrator` can add new fields to address
book entities in the master data area. These fields as useable for
editors and visitors, too.
Removed features
----------------
- Removed some fields which are not always necessary and which can be
re-added when needed as user defined fields:
- state field on the postal address (only displayed German
states, though),
- sex field on person,
- notes fields on address book, postal address, phone number, e-mail
address, home page address, file and keyword,
- kind fields on postal address, phone number, e-mail address and
home page address.
Bug fixes
---------
- Uploading a new file changes the stored name of the file.
- When uploading a file with an unknown mime type (aka
`application/octet-stream`) the actual mime type is guessed using
the file extension and file content.
- The person list is now ordered by the displayed titles instead of
the internal ids.