Adding appstore button component

[shouvikbhuiyan1990]

properties

• gap - defines gap between icons in pixels
• iconWidthLarge - max width of the icon in desktop/laptops/tablets
• iconWidthMobile - max width of the icon in mobile devices
• appleImage - Image to be displaed in all laptops/desktops/tablets for apple store
• androidImage - Image to be displaed in all laptops/desktops/tablets for android store
• iosStoreClick - click function of apple store button
• androidStoreClick - click function of android store button