- adds tests on filter parse & check
- standart filters parse & check
- relational filters parse & check
- bugfixes related to tests in query.py
- update the example and the test EM
- bugfixes in admin script
Refactoring of datahandlers to simplify from_name() method
Warning, this commit is in a broken state. The em_test.py doesn't works yet
because it uses old relation handler (that doesn't exists anymore). The pickle file in
example is broken too