En plus de modifié la valeur en base, modifie la valeur d'instance.

Prise en compte du nom de la collonne indiqué par ranked_in

Fonction new_rank dans component. Permet la modification d'un rank tout en gardant la collection de component valide.

The dates are set in EmComponent::create() for date_create and in EmComponent::save() for date_update
The values are sets to datetime.datetime.utcnow() so we now that EVERY date in the db are in UTC, no matter django, database or even server configurations.
We will have to take care to convert dates from database to django timezone in dates fieldtypes.

Added a classmethod EmComponent::newUid() that determines the caller's class and return a newly registrated UID

SQL calls are in _populateDb , _saveDb and _createDb methods (exception for component::delete() )

Removed logging test in EditorialModel/lib/component.py
Added comment in Database/sqlwrapper.py

Test functions name as tests files name must begin with test in order to be run by manage.py test

Created the class Lodel.utils.mlstring.MlString needed by EditorialModel.lib.component.EmComponent
The first test pass ! =)

Lodel/sttings/__init__.py wasn't able to import files when called by manage.py
Renaming em to EditorialModel and moved Em* objects to EditorialModel/lib
Adding a first test (that do not pass because of syntax errors in Em* classes)