title: keyCode to character with libgdx keydown event
body: <p>I've got a custom textbox that I've written for my game and I'm trying to receive keyboard input. I thought this really can't be that hard, but I've spent a while searching now, and can't find an easy way to convert from the Keycode passed to a character. I'm assuming there must be an easy way to achieve this rather than me creating my own lookup. If someone could please point me in the right direction that'd be much appreciated.</p>
  
  <p>I need this to work for both phone and desktop input.</p>
  
  <p>Option 2 is to resort to the libgdx UI controls, but I <em>thought</em> spending 15 minutes knocking up my own textbox would be quicker than me learning all that... not quite as quick as I'd hoped.</p>
  
  <p>Thanks</p>
  
  <p>edit: The libgdx documention suggests that Input.Keys contains a static toString(int keycode) method... but it doesn't seem to be there. Has it been moved elsewhere?</p>