Made changes in GameState & 2048Model
Merge branch 'master' of https://github.com/zeevmoney/JavaProject-ZL.git
1. removed newGame (it's useless, does the same as restart)
2. changed State to GameState
3. Aded GameStateXML class (save/load game), using Xstream package.
4. added Xstream jar
5. added resources folder
6. added some methods to GameState