title: Parse API 1.6.4 - cannot build project
body: <p>I downloaded the new iOS Parse API (1.6.4) and tried to build my project. When I do, I get this error:</p>
  
  <pre class="lang-none prettyprint-override"><code>Undefined symbols for architecture arm64" "_BFTaskMultipleExceptionsException", referenced from:
    ___53+[PFObject(Private) deleteAllAsync:withSessionToken:]_block_invoke214 in Parse(PFObject.o)
    ___65+[PFObject(Private) _deepSaveAsync:withCurrentUser:sessionToken:]_block_invoke311 in Parse(PFObject.o) 
  ld: symbol(s) not found for architecture arm64
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>Screenshot:
  <img src="https://i.stack.imgur.com/ppXqR.png" alt="screenshot"></p>