Update SKButton.h

 *Add convenience methods:
+ (id)buttonWithTextureNormal:(SKTexture *)normal selected:(SKTexture *)selected;
+ (id)buttonWithTextureNormal:(SKTexture *)normal selected:(SKTexture *)selected disabled:(SKTexture *)disabled;
+ (id)buttonWithImageNamedNormal:(NSString *)normal selected:(NSString *)selected;
+ (id)buttonWithImageNamedNormal:(NSString *)normal selected:(NSString *)selected disabled:(NSString *)disabled;

 *Add method for set up label in to button image: 
- (void)buttonTitle:(NSString *)title fontName:(NSString *)fontName isTraghetDeviceUniversal:(BOOL)isTraghetDeviceUniversal fontSize:(CGFloat)size fontColor:(UIColor *)color;

 *Add property for label effect:
@property (nonatomic) BOOL isEffectTitle;