Support 1.8's UUIDField #2432
Description
As per comment here: #2426 (comment)
Current str field would result in...
File "/Users/tomjaster/DevFolder/master/airyengine/airy/lib/rest_framework/utils/encoders.py", line 60, in default
return super(JSONEncoder, self).default(obj)
File "/usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/encoder.py", line 184, in default
raise TypeError(repr(o) + " is not JSON serializable")
TypeError: UUID('335680b8-0f20-4e25-a0e2-3caa052a3e83') is not JSON serializable
We should validate UUID values, and handle str() of them in both the encoder, and in the serializer field.