Better support for "unicode" function in Python3

[msarfati]

Traceback (most recent call last): File "/home/msarfati/devel/pubgem/rss-aggregator/rss_aggregator/tests/models/test_rss_feed.py", line 25, in test_create rss_url="https://www.genericfeed.com/feed.xml", File "/home/msarfati/.virtualenvs/pubgem-rss-aggregator/lib/python3.5/site-packages/flask_diamond/mixins/crud.py", line 78, in create flask.current_app.logger.debug("create %s" % unicode(obj)) NameError: name 'unicode' is not defined
You'll just have to update all the references to unicode throughout Diamond.