Add Python 2 and Python 3 classifiers
Run on Python 3.4
Add 3.4 classifier
Also test on PyPy
Merge pull request #27 from frewsxcv/python-3.4

Enable testing for Python 3.4 on TravisCI
Fix error message formatting

[Brought up here](https://github.com/frewsxcv/python-geojson/commit/5d0a4f8c31a3dbd56efec3390d80adad94cc915c#commitcomment-6612293)
Fix README spelling
Merge pull request #35 from skj3gg/patch-1

Fix README spelling
Enable testing on PyPy 3
Merge pull request #36 from frewsxcv/pypy3

Enable testing on PyPy 3
Update README to mention 3.4 compatibility
Remove unnecessary whitespace
Unicode properties keys, regression test
Add mention to changelog
Add test file
Merge pull request #39 from frewsxcv/unicode-bug-fix

Unicode bug fix
Document new utilities, move to new location
Fix headers
Fix sort order tests
Attempt to fix ToC links