title: Creating user Story with least Rank
body: <p>By Default, any user story created gets the highest Rank in an iteration. But my requirement is to add the user story at the bottom of iteration , not on Top, means with least rank. How can I manipulate the Rank of a User Story. In WSAPI 2.0 , I see there is an attribute - DragAndDropRank, but the value is not an integer and older version of WSAPI (1.3) was having Rank attribute, which can be manipulated. Any suggestions on implementing this would be helpful for WSAPI 2.0. Thanking in advance.</p>