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.
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
Docs tweak
Kick travis
Docs on object level permissions and filters. Closes #1683
Fusion ads
Kickstarter note on front page
Docs for kickstarter announcement
Beef up the kickstarter announcement
Typo
Phrasing tweak
Kickstarter announcement