Add Card component

[Romel Perez]

Add Card component to display contained information.

• Add Card component.
  • It is an article element.
  • It should have 100% width.
• Add image: string required prop as image URL.
  • Image aspect ratio by default should be 2/4.
  • If landscape is enabled, aspect ratio will be variable according to the card size.
  • It should have a background color by default if loading or error.
• Add landscape: boolean = false prop to define the layout. If disabled, the image is up, otherwise it is located to the left.
• Add hover?: boolean = false prop to allow hover/focus highlights on mouse over/focus.
• Add header prop as title components as h1 element.
• Add options prop as footer options, buttons, or links components.
  • It should be positioned at the bottom of the component regardless of the root height.
• Add children required prop as description components.
  • Support height content overflow limitation if root element has height defined.
• Add transition animations.
• Add transition bleep.

[Romel Perez]

Closed due to #46 (comment)