Admin template static files moved to correct path

Django admin template static files need to be on correct path from our
static files...
Updated readme with python and django versions
Added admin button to Frontend

Now we don't need to type the /admin/ URL
Updated detail course template with students on it

List the students on the template...
Admin bug from inline students on Add Course

Models.py : Updated Class model with ManytoManyField for Students and
Courses. Also a class Students_in_Course is created to hold the
relationship

admin.py: Commented out the inline options that were the ones crashing
the foocking admin. Now we don't show the students on the courses, when
creating a new course... We'll see how we put again a proper list of
students..