TeamScreen fixed.
waiting screen added
Merge remote-tracking branch 'origin/feature/juanlu' into feature/luis
new feature/juanlu
RankingScreen and Characters implemented
socket connection
Merge branch 'feature/luis' of https://github.com/juanlu91/roltactic into feature/juanlu

Conflicts:
	core/src/com/heads/rolt/MyGame.java
	core/src/com/heads/rolt/screens/WaitingScreen.java
json lib added