Created the class MlString and fixing syntax error

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

EditorialModel/lib/component.py

     @see EmClass, EmType, EmFieldGroup, EmField
 """
 
-from ml_string import MlString
+from Lodel.utils.mlstring import MlString
 
 class EmComponent(object):
 
             raise EnvironmentError('Abstract class')
         if id_or_name is int:
             self.id = id_or_name
-        else if id_or_name is str:
+        elif id_or_name is str:
             self.name = id_or_name
             self.populate()
         else:

Lodel/utils/mlstring.py

+# -*- coding: utf-8 -*-
+
+class MlString(object):
+    """ Handle string with translations """
+
+    def __init__(self, default_str, translations = dict()):
+        pass