created group model
merge deanmax 0413
Finish group create and show
Finish group edit and delete
Finish student register for group
Finish group index
Finish post model
Correct user can make posts
updated todo
Finish search for group name
coach can delete student
Finish personal message
Finish rating system
Coach can upload and show picture
Coach can send group emails
add schedule to group
Add ssl certificate
include vendor assets