Try to import Python's OrderedDict

There is an OrderedDict in Python 2.7+.
The try order is now as follows:
* OrderedDict from Python's collections module
* OrderedDict from the jsonencode module (dependency)
* OrderedDict from the ordereddict module (pypi package)
* our own OrderedDict

weboob/tools/ordereddict.py

@@ -18,9 +18,15 @@
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
 
+try:
+    from collections import OrderedDict
+except ImportError:
+    try:
+        from simplejson import OrderedDict
+    except ImportError:
         try:
             from ordereddict import OrderedDict
-except:
+        except ImportError:
             ## {{{ http://code.activestate.com/recipes/576693/ (r6)
             from UserDict import DictMixin