Feature/manage list

在原来的图形版基础上增加了文字版，增加了管理页面，模板里面有个地方忘记空多一行··（等等再改··）
```
def get(self, request):
    app_id = request.GET.get('id')
    app = get_object_or_404(StuActCenterApp, id=app_id)
    form = StuActCenterAppForm(instance=app)
    post_url = reverse('common:%s?id=%d' % (name, app_id))
    return render(request, 'room/form.html', {'form': form, 'app_id': app_id, 'post_url': post_url})
```