Refactored BD.ajax into ajax-request, BD.ajax is now $.ajax for easy external override
Merge pull request #32 from billysbilling/ajax-refactor

Refactored BD.ajax into ajax-request, BD.ajax is now $.ajax for easy external override
v0.14.0
Set `paging` on record arrays from response' `meta`
Record array should call parent\ willDestroy
BD.deleteRecords should return event target for empty arrays
Destroy has-many record arrays when unloading parent\nThis fixes a problem with BD.store.reset when being called after a parent has been deleted but its children array is still alive and referencing the now destroyed parent