Python 3 metaclass compatibility for Field subclasses.
add section about installing / configuring django_extension in readme
runserver_plus: add IPv6 and FQDN address support

The former version did not support commands like
 runserver_plus [::]:8080 OR example.org:8080.

This is a backport from django/django d7fa33af and 6a32e253.
Allow to set default address/port for runserver_plus in settings
Fix testUUIDField_pkAgregateCreate against MySQL
fix #355 compare tuples instead of list and tuples
Added travis status image
updated test to support python 3
fixes #359
v1.2.0
bumped version number
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More robust handling of public/private keys in encrypted fields.

- Fixed bug where 'Decrypt' could get called when no private key was available.
- More portable testing of encrypted fields in general.
- Added tests specific to public keys.