Version 1.3

All in all a "minor" update for the user, with greater implication
behind the screen.

• New Translations:
  • Catalan by @PauBatlle
  • Spanish by @PauBatlle
• Game mode updates:
  • Updated REDB Mode to the new ReGeX game protocol, see http://redb.org.uk
  • Implemented Random word game, with word-list downloading
• Switched from Markdown to Org for documentation
• Technical
  • Rewrote internal structure of game generation
  • More threads
  • More mathematical nonsense