Set jsonpickle to encode html tags to be html safe

encoded.py

>>> import jsonpickle
>>> import simplejson.encoder
>>> t = '<script src="http://www.google.com/auth.js"></script>'
>>> jsonpickle.encode(t, unpicklable=True)
'"<script src=\\"http://www.google.com/auth.js\\"></script>"'
>>> jsonpickle.set_encoder_options('simplejson', cls=simplejson.encoder.JSONEncoderForHTML)
>>> jsonpickle.encode(t, unpicklable=True)
'"\\u003cscript src=\\"http://www.google.com/auth.js\\"\\u003e\\u003c/script\\u003e"'
>>> import datetime
>>> d = {'html': t, 'date': datetime.datetime.now()}
>>> jsonpickle.encode(d, unpicklable=False)
'{"date": "2014-10-02 13:44:11.481521", "html": "\\u003cscript src=\\"http://www.google.com/auth.js\\"\\u003e\\u003c/script\\u003e"}'

# new shell to undo set_encoder_options and test
>>> import jsonpickle
>>> import simplejson
>>> import json
>>> d = '{"date": "2014-10-02 13:44:11.481521", "html": "\\u003cscript src=\\"http://www.google.com/auth.js\\"\\u003e\\u003c/script\\u003e"}'
>>> jsonpickle.decode(d)
{u'date': u'2014-10-02 13:44:11.481521', u'html': u'<script src="http://www.google.com/auth.js"></script>'}
>>> json.loads(d)
{u'date': u'2014-10-02 13:44:11.481521', u'html': u'<script src="http://www.google.com/auth.js"></script>'}
>>> simplejson.loads(d)
{u'date': u'2014-10-02 13:44:11.481521', u'html': u'<script src="http://www.google.com/auth.js"></script>'}