chr
byteschr
unichr
Needed to appease Travis; it's python 2.6 and 2.7 builds are weird and the `__builtins__` dict is not following CPython conventions.
JSON *must* be encoded using UTF-8, UTF-16 or UTF-32 (see the [RFC][1]; detect the encoding based on the fact that JSON always starts with 2 ASCII characters. [1]: http://tools.ietf.org/html/rfc4627#section-3