updates
user teacher_profile object for teacher index page instead of user objects
add method using find_by_sql for ordering teacher_profiles by average review ratings
successful test of using ajax to load profile list
change id of rating sorting options to match method names in rails
fix problem when there is image for any imageable model with helper method
make photo attribute accessible
move rails.png
add teacher_profiles with no reviews to the collection which is ordered by highest average rating