Reduces visibility of internal fields/methods

Reduces the visibility of all fields to private and create setters/getters
when necessary. Exceptions are fields with GuiSync as these need to be
public.

Reduces the visibility of internal methods to private/protected/default when possible.

src/main/java/appeng/me/cache/helpers/ConnectionWrapper.java

@@ -25,10 +25,20 @@ import appeng.api.networking.IGridConnection;
 public class ConnectionWrapper
 {
 
-	public IGridConnection connection;
+	private IGridConnection connection;
 
 	public ConnectionWrapper( final IGridConnection gc )
 	{
-		this.connection = gc;
+		this.setConnection( gc );
+	}
+
+	public IGridConnection getConnection()
+	{
+		return this.connection;
+	}
+
+	public void setConnection( final IGridConnection connection )
+	{
+		this.connection = connection;
 	}
 }