v0.7.5b: refactored renderedTextMultiline

It is now much more flexible, and is used in all places.

SPD-classes/src/main/java/com/watabou/utils/PlatformSupport.java

@@ -45,5 +45,9 @@ public abstract class PlatformSupport {
 	public abstract void resetGenerators();
 	
 	public abstract BitmapFont getFont(int size, String text);
+	
+	public abstract String[] splitforTextBlock( String text, boolean multiline );
+	
+	public abstract float getFontHeightOffset( BitmapFont font );
 
 }