Updated libGDX to v1.3.0 and roboVM to 0.0.14.
Changed working resolution from 960x540 to 960x600.
Fixed issue: username flushed to prefs regardless of validity.
Added EditDeck and Card packet classes for DeckManager.
Added EditDeck server response implementation.

The implementation sets up a screen to view the cards already in the deck's
card list.