On unload, remove record from has many arrays.
Don't try to clean null belongsTo attributes.
Fixed a bug preventing finding record with id of 0 (#352)
Merge pull request #353 from existentialism/find-zero-id

Fixed a bug preventing finding record with id of 0 (#352)
Merge pull request #350 from karenliu1/null-belongs-to

Don't try to clean null belongsTo attributes.
Merge pull request #339 from karenliu1/remove-has-many-record

Tests for deleting/unloading records in hasmany relationships.
RESTAdapter supports loadSaveResponse flag that causes the record to be
loaded from the response the server returns on a save().
RESTAdapter loads response, if it contains data, on save
Merge pull request #340 from jnovatnack/jnova/load-save-response-flag

RESTAdapter supports loadSaveResponse flag that causes the record to be loaded from the response the server returns on a save().