- Fix#49 -- The old fix caused problems with other servers. The new
behavior only decodes ``@`` characters.
- ``@`` is now not used when generating a new href, as some servers seem
to have problems with it (http://sabre.io/dav/character-encoding/).
This behavior is configurable via the ``unsafe_href_chars`` parameters
for DAV storages, and is disabled in the testsuite for Radicale and
ownCloud.
- Decoding of hrefs is also done twice for CarddavStorage.list because
of owncloud/contacts#581. Vdirsyncer has behaved like that before, but
not intentionally.
- Storages now don't share their ``_get_href`` methods anymore.
