Extended test with case of saveing model with blank not null field.
Charfied from_native method returns default instead of None. Updated tests.
In case of None value returns empty string instead of NoneType.
Fixed test.
Fixed #1624 (thanks @abraithwaite)
Fix #1614 - Corrected reference to serializers.CharField
Merge pull request #1632 from fletchowns/master

Fix #1614 - Corrected reference to serializers.CharField
Version 2.3.14
Fix accidental docs change
Merge pull request #1640 from tomchristie/escape-login-logout-paths

Version 2.3.14
typo in the docs
Merge pull request #1645 from tankorsmash/patch-1

tiny typo in the docstring
Fixes #1651. Add link to drf-extensions nested routers to docs
Merge pull request #1661 from chibisov/master

Fixes #1651. Add link to drf-extensions nested routers to docs
Merge branch 'master' into modelserialization-charfield-with-null
Merge pull request #1665 from smal/modelserialization-charfield-with-null

Modelserialization charfield with null