Cosmetic improvements to README.rst
Add installation instructions.
2to3
Merge branch 'master' of https://github.com/samdobson/django-rest-framework-csv into py3

- Cosmetic improvements to README.rst
- Add installation instructions
- Run through 2to3 for Python 3 compatibility
Update the Travis configuration to test against python 3
Fix tests for Python 2

- Add dependency on six
- Use six.StringIO for compatibility with StringIO.StringIO and io.StringIO
- Use six.string_types to check whether an object is a string
- Use unicode_literals from __future__ to avoid the literal u'...' syntax
Test against Python 3.2 and 3.3 (instead of 3.3 and 3.4)
Fix the tests for Python3
Version bump