fix(demo): remove disable panning call in the demo
fix(code): change method name to setPanningEnabled

Changed padding on/off method name to setPanningEnabled instead of setEnabled to avoid overriding the View class setEnabled method.
fix(scale): fix image scaling and panning for wide / tall images

Fixed wide / tall image scaling and panning. Tall images now always animate from top to bottom and wide images from left to right. This way the image always fills the screen and all the image content is shown in the animation process.