/api/v2/devices/{id} API call returns invalid JSON

[thegoose]

This call returns invalid JSON according to http://jsonlint.com/ (the offending line is for AccessTokenExpiration, which should return a string, but does not quote the "date"). This JSON also causes the default python JSON parser to fail. Please fix.

"AccessTokenExpiration": 2014-10-31,
"AccessTokenExpiration": "2014-10-31",