Initial support for writable nested serialization (Not ModelSerializer)
Extra tests for nested serializers
Descriptive text for NestedValidationError
Merge branch 'master' into basic-nested-serialization
One-to-one writable, nested serializer support
one 2 one nested relationships
Clean out ModelSerializer special casing from Serializer.field_from_native
Merge branch 'master' into basic-nested-serialization
Merge branch 'basic-nested-serialization' into one-to-one-nested-wip
Remove erronous _delete attribute
Remove unneeded arguments to save_object
Clean up and comment `restore_object`
Fixes to save_object
Fixes to save_object
Merge pull request #735 from tomchristie/one-to-one-nested-wip

One to one writable nested model serializers (wip)
accept all WritableField kwargs for writable serializers (eg required=True)
allow default values in writable serializer fields
use writablefield style for serializer handling of self.default
Merge pull request #739 from craigds/basic-nested-serialization

tweaks to writable nested serializers
Merge branch 'master' into basic-nested-serialization