* Workaround for bad behavior in string subclasses
https://github.com/simplejson/simplejson/issues/144
* Fix warnings flagged by -3
https://github.com/simplejson/simplejson/pull/146
* Update readthedocs documentation links
https://github.com/simplejson/simplejson/pull/137
* Add build status badge to README
https://github.com/simplejson/simplejson/pull/134