Python3

[mjschultz]

This does a few small changes to add support and testing for Python 3:

• Tweaks the .travis.yml to test Python 3.2, 3.3, and 3.4 in addition to 2.6 and 2.7
• Bumps the Django releases to their most recent patch versions (strictly speaking you could drop support for 1.5.x and 1.6.x since the Django Project no longer supports them)
• Also switches travis to use the container infrastructure (faster builds)

Within the code I've changed instances of force_unicode to force_text and smart_unicode to smart_text; see Django's guide to Porting to Python 3 for details.

I also instrumented some code to handle the "xrange is just range in Python 3" problem so xrange is used in Python 2 and range is used in Python 3.

[mjschultz]

I decided to drop Python 3.2 tests since this is a fairly unicode-aware app and Python 3.2 dropped support of the u'unicode' literal notation. This was quickly realized to be a bad idea and was added back in Python 3.3 and 3.4 to make it easier to port projects like this.

I can attempt to jump through the hoops to get Python 3.2 support but I think it would make the code much more convoluted than it needs to be.

[mjschultz]

I would not mind a PyPI release if you merge this! :)

[landscape-bot]

Repository health increased by 0.08% when pulling 808eaa1 on mjschultz:python3 into fb7ac2a on tarak:master.

• 7 new problems were found (including 0 errors and 1 code smell).
• No problems were fixed.

[tarak]

Thx! Sorry for the delay...