Moved ModelTest directory into UnitTest directory
forgot to define the loader into testfiles
Finders modified:

- added if condition to each functions to check if $id is a int >= 0
finders Modified
Added order by into finders
added the condition orderBy to the finders
Forgot to put the parameter $orderBy into the parenthesis of each findAll function
Merge branch 'benjamin'

Conflicts:
	src/Model/Finders/FinderAbstract.php
	src/Model/Finders/PlaceFinder.php
app modified:
Modified TemplateEngine.php:

- modified the rendre function to render a view into a layout if the layout is define
Modified app.php & templates\views\home.php:

- app.php, for app->get('/' to passe arguments to the view, don't need to passe array(array(), array())
  just 'placesList' => $placesList, 'eventsList' => $eventsList

- home.php, variable name changed to $eventsList and placesList
Modifier finders:

- modifid the algo findAll function:
  If you want to find All object with the date_begin > Now,
  you must specify a symbol comparator such as:
   - lt (lesser than) which correspond to <
   - gt (greater than) which correspond to >
   - lte (lesser and equals than) which correspond to <=
   - gte (greater and equals than) which correspond to >=
   - eql (equals) which correspond to =
   - like (like) correspond to LIKE
checked all classes
Created A simple Validator for the forms:

- make more rules
- ex: Validator::string()->max(10)->notEmpty()->validate($input);
it will return the input if the input is a string, composed of 10 characters max  and not empty else return null
Added validators