title: Deprecated vs Unsupported SDK
body: <p>What is the difference between an SDK that is "deprecated" and one that is "unsupported"?</p>
  
  <p>I am asking in the context of developing javascript applications for Rally - I was fixing up an old application when I noticed the SDK will become unsupported in under 2 months.  Does this mean the app will no longer work at all when the SDK becomes unsupported? Thanks</p>