First version to the course system clone,

Now I test it in a simple views in courses/views.py
Add the  migrations ot he previous commit
Remove comment code
Add support to clone the Attachment model
Adapt the code to first version of django-deep-serializer. Remove the test view, and add this view in the admin site
Defensive programming
Remove unique restrinction in the badge relation
Remove restinction unique in the model

Add forgot files
Add a new command to clone a course
Add trace id feature
Improvements trace id, now without db queries
Fix some details from clone course feature
Add clone_activiy_user_course command (first version)
Remove the monkey patching, this was an error and a horrible decision
Now if an activity or an answer is in the new couse, the info is updated. I had problems with the identifiers: These are integer or double, for it I removed  of the queries
Adapt the code to django-deep-serializer==0.1.0
Now the course is created with draft status
Now the folder where saving the trace files are automatically created
Spanish translations
Add django-deep-serializer spec