title: Proguard custom naming for classes, members and parameters obfuscation
body: <p>Is there a simple description of how the dictionary file in Proguard should be structured?</p>
  
  <p>I've read about <code>-?obfuscationdictionary</code>, but I couldn't find anything about the files themselves.</p>
  
  <p>Besides, I'd like to change the naming scheme to something more complex, and not just <code>a</code>, <code>b</code> etc. and <code>paramX</code>, <code>paramY</code>... I'd like a random series of characters, if possible.</p>
  
  <p>And yes, I know it's just a visual difference that can be remodeled (refactored?) to something easier to read. Still, just asking...</p>
  
  <p>Thanks</p>