Move file edit from views/__init__.py to views/file.py

urls.py

@@ -4,7 +4,7 @@ from django.views.generic.simple import direct_to_template
 
 from seahub.views import *
 from seahub.views.file import view_file, view_history_file, view_trash_file,\
-    view_snapshot_file
+    view_snapshot_file, file_edit
 from seahub.search import search
 from notifications.views import notification_list
 from group.views import group_list
@@ -131,4 +131,4 @@ else:
 if getattr(settings, 'ENABLE_FILE_SEARCH', False):
     urlpatterns += patterns('',
         url(r'^search/$', search, name='search'),
-    )
+    )