Add connection feature

Multiplayer enabled
Powerup unimplemented
Change assets
Update connection classes

Included Scott’s serverScreen and clientScreen.
But I call the multiplayer screen with ‘play’ button.
Comment on GameScreenClient
Merged the branches. Hopefully I did everything correctly. Log below.

Merge commit '2002bea9d3d817da2c6d35462e90ad1cbd3ca2f3'

Conflicts:
	AndroidManifest.xml
	bin/AndroidManifest.xml
	bin/ProjectGame.apk
	bin/classes.dex
	bin/classes/com/badlogic/androidgames/mygame/ClientManagement.class
	bin/classes/com/badlogic/androidgames/mygame/ClientScreen$ClientThread.class
	bin/classes/com/badlogic/androidgames/mygame/ClientScreen.class
	bin/classes/com/badlogic/androidgames/mygame/GameScreen.class
	bin/classes/com/badlogic/androidgames/mygame/MainMenuScreen.class
	bin/classes/com/badlogic/androidgames/mygame/Player.class
	bin/classes/com/badlogic/androidgames/mygame/ServerManagement.class
	bin/classes/com/badlogic/androidgames/mygame/ServerScreen$ServerThread.class
	bin/classes/com/badlogic/androidgames/mygame/ServerScreen.class
	bin/classes/com/badlogic/androidgames/mygame/World.class
	bin/resources.ap_
	src/com/badlogic/androidgames/mygame/ClientManagement.java
	src/com/badlogic/androidgames/mygame/ClientScreen.java
	src/com/badlogic/androidgames/mygame/GameScreen.java
	src/com/badlogic/androidgames/mygame/MainMenuScreen.java
	src/com/badlogic/androidgames/mygame/Player.java
	src/com/badlogic/androidgames/mygame/ServerManagement.java
	src/com/badlogic/androidgames/mygame/ServerScreen.java
	src/com/badlogic/androidgames/mygame/World.java