Pictures on

-Feature! Uploading pictures is already implemented
-HousePictures class fully complete
-Fixed some bugs
-I replace the user's and customer's ids by their names
-For debugging purposes, I inserted the name of the current user in the
footer

Notes:
-BUG: The highlightning of the top menu does not work, it always highlight Users

-In the top menu, we should hide some options when we are not logged in