Changed the working of the iterative_task decorator.
The decorator now needs the logic for the model which it fetches. This is much nicer then "fetching" it using import.
Also order has been removed since it has no use when iterating over all entities when key is involved. Fields to filter can now dynamically be set by the function that is wrapped.
Note that it will merge the filter with the task_default kwarg and it will only use the start_key if their is no key present in the context.
Also note that task_default gathers all kwargs. I tried to do it otherwise (with default kwargs) but I couldn't get it to work. Feel free to improve :).
Third-party code that is *not* part of the application image (the Google App
Engine SDK in trunk/thirdparty/google_appengine, for example) belongs in
trunk/thirdparty. For third-party code that *is* part of the application
image, see the notes in trunk/app/README.
== THIRD PARTY LICENSES ==
Third-party code must also include a license text file, named LICENSE or
COPYING, in the package subdirectory. If the third-party package subdirectory
is maintained automatically with a tool such as svn_load_dirs.pl (which
removes files, such as license text files, that were added later to the
"target" directory), place the license text file in the trunk/app directory
and add the package name as a suffix.