Not all responses return proper JSON

[msukmanowsky]

ReportSuite.DeletePaidSearch for example only returns 1 or 0 as (its response)[https://developer.omniture.com/en_US/documentation/omniture-administration/r-deletepaidsearch].

Right now ROmniture's client will crash when it tries to parse this as JSON. Recommend throwing around a try/catch block to attempt to parse JSON and if we can't, then simply return the raw response.