add file upload for student activity center application
move org validation from views of stu act cen  to account, add app campus_field. Both have not tested yet
write campus_field code, fixing problem that multiple choice widget can't validate correctly
use custom multiple value model field
add application for publicity activity
finish publicity application
add meeting room application
add custom template tag in html_tools, add full html and css to table of student activity center
add south_stadium
modify  get_applications_a_week for CampusFieldApplication