uDPRE 0.5.5

• Internet play: only one player has to be reachable now. That player forwards UDP + TCP 39310-39317 (or you use a virtual
  network), the others add that address under Friends' addresses, and Team Up, battles, the Union Room, the Colosseum, the
  Underground and contests all travel through the overworld link when two players cannot reach each other directly. There is no
  uDPRE server: if nobody can forward a port, you still need a virtual network. On a home network nothing changes: games still
  connect directly.
• Fix: Team Up stuck on "Joining ...'s battle" until it went solo, and battle invitations that never connected. Each room used to
  need its own direct link to whoever opened it, so it failed whenever that player could not be reached, even though you could
  see each other in the world.
• Fix: a game behind a router could stay in a world of its own, never meeting the player it had the address of.
• World host: rebuilt for this version. Use the one that comes with uDPRE 0.5.5.
• README: the LAN part corrected (who needs open ports, Friends' addresses, the Windows Firewall), and how to Team Up and which
  battles stay solo.
• Luminescent and Dechibified 1.3.5: the same in their game code.
• All players need uDPRE 0.5.5 to meet: this version does not meet 0.5.4.