Removed CommCare Exchange ratings and reviews

Also removed sorting by ratings.
avoid invalidaing the cache unless necessary
property use the updated sort algorithm when rebuilding a case via UI

http://manage.dimagi.com/default.asp?146043
make rebuildstaging merge details not crash on merge commit
obey strict parameter
Merge pull request #4634 from dimagi/remove-hutch

remove hutch
Removed Review model and AddReviewForm
Merge pull request #4747 from dimagi/remove_exchange_ratings

Removed CommCare Exchange ratings and reviews
keep the order of POST body when creating fixture table
remove debug print and comments
Merge pull request #4759 from dimagi/fixturefieldorder

make lookup table with the fields in the same order as they are entered
move project to class initialization
Look for list of domains in get_document_or_404
Look at domain and domains for get_document_or_404
Merge pull request #4749 from dimagi/strict-domain

avoid invalidaing the cache unless necessary
clarify credit line table
Handle doc without domain or domains
Initial tests for get_document_or_404
Merge pull request #4760 from dimagi/fix-edit-web-user

Look for list of domains in get_document_or_404
Merge pull request #4763 from dimagi/test-get-document

Test get document