Only add Id to list of fields to be retrieved if it is not already there
Only add Id to list of fields to be retrieved if it is not already there

nutthawan/Force.com-JavaScript-REST-Toolkit,vertexcs-suraj/Force.com-JavaScript-REST-Toolkit,developerforce/Force.com-JavaScript-REST-Toolkit,vertexcs-suraj/Force.com-JavaScript-REST-Toolkit,nutthawan/Force.com-JavaScript-REST-Toolkit,developerforce/Force.com-JavaScript-REST-Toolkit,nutthawan/Force.com-JavaScript-REST-Toolkit,vertexcs-suraj/Force.com-JavaScript-REST-Toolkit,developerforce/Force.com-JavaScript-REST-Toolkit