reset stored credentials when call client.logout()
Allow customising ChoiceField blank display value
Automatically set the field name as value for the HTML `id` attribute on the rendered widget.
Added test case to check if the proper attributes are set on html widgets.
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.
Add colon to time zone offset in readable_datetime_formats
Merge pull request #1575 from ewdicus/iso8601

Add colon to time zone offset in readable_datetime_formats
Updated failing test from #1575
Merge pull request #1576 from carltongibson/fix-#1575

Updated failing test from #1575
Merge pull request #1564 from alumni/master

Fixes #1535 (HTML widget missing `id` attribute)
Enable testing on Python 3.4
Typo fix.
Merge pull request #1585 from glogiotatidis/master

Typo fix.
Merge remote-tracking branch 'frewsxcv/patch-1' into feature/python34
Updated tox with Python 2.4
Typo in the Python version.
Fixed tests for python 3.4