jzaefferer/jquery-validation — pull request #1082 by magicxie (2014-04-14 13:18:18+00:00)
Title: try fix #1081

According to official document, remote method should be able to accept string response text.
Change datatype of remote ajax request to accept text, setting datatype to json will cause parse error when parsing string.

Test case on: http://jsfiddle.net/C8q84/