title: three20 error after adding it to my project
body: <p>I have been trying to add the Three20 framework to my app. But I always end up getting this error:</p>
  
  <pre><code>Undefined symbols:
  "___restore_vfp_d8_d15_regs", referenced from:
  +[TTEntityTables(TTSingleton) sharedInstance] in libThree20Core.a(TTEntityTables.o)
  +[TTEntityTables(TTSingleton) releaseSharedInstance] in libThree20Core.a(TTEntityTables.o)
  +[TTEntityTables(TTSingleton) allocWithZone:] in libThree20Core.a(TTEntityTables.o)
  "___save_vfp_d8_d15_regs", referenced from:
  +[TTEntityTables(TTSingleton) sharedInstance] in libThree20Core.a(TTEntityTables.o)
  +[TTEntityTables(TTSingleton) releaseSharedInstance] in libThree20Core.a(TTEntityTables.o)
  +[TTEntityTables(TTSingleton) allocWithZone:] in libThree20Core.a(TTEntityTables.o)
  ld: symbol(s) not found
  
  collect2: ld returned 1 exit status
  </code></pre>
  
  <p>it seems like some kind of linker error to me, but I'm rather shure I followed all instructions on how to install the framework.<br>
  Somehow I get the suspicion, that it is a bug within the framework, but I'm not shure. Any ideas?</p>