Added Partner.admin filter by is_active
Added question_list in Poll.admin
Added AnswerAdmin
Added missing Course.get_statistics_url.
This fixes the statistics dashboard dropdown for courses not redirecting.
Added basic ChoiceAdmin and QuestionAdmin.
Fixed courses stats URL being inconsistent.
Also commented assignments stats URL since it's unclear what it does for now.
Added Course model is_free field.
Added statistics show_courses_stats.
Also major fixed in other statistics.views
Small template fixes in statistics and also,
important fix for the calculation of total_courses_funds in show_all_courses
Added test for Poll.get_question_list
Added staff_user for statistics/tests_views
Merge pull request #30 from HackBulgaria/dev

Updated tests, views and stats