Remove deprecated views and the corresponding templates

There are 14 views marked as deprecated in program/views.py.

• CalendarView: calendar.html
• HostListView: host_list.html
• HostDetailView: host_detail.html
• ShowListView: show_list.html
• ShowDetailView: show_detail.html
• TimeSlotDetailView: timeslot_detail.html
• RecommendationsListView: recommendation_list.html
• RecommendationsBoxView: boxes/recommendation.html
• DayScheduleView: day_schedule.html
• CurrentShowBoxView: boxes/current.html
• WeekScheduleView: week_schedule.html
• StylesView: styles.css
• json_day_schedule
• json_timeslots_specials

We should get rid if them before version 1.0.