6 (codename to be selected, release date unknown)
8 - blocks now support ``{{ super() }}`` to render the parent output.
10 - debugging system improved, smaller filesize for the cached files.
12 - added whitespace management system for the template designer.
14 - some small bugfixes.
16 - improved security system regarding function calls.
18 - added `lipsum` function
20 - strings without unicode characters are processed as binary strings now
21 to workaround problems with `datetime.strftime` which only accepts
27 (released Mar 23, 2007)