Paddings

Bootstrap provided new padding classes in version 4 but in some cases those are not enough so I added several more to make your design process faster

1. padding all 4rem p-a-4
2. padding top 4rem p-t-4
3. padding right 4rem p-r-4
4. padding bottom 4rem p-b-4
5. padding left 4rem p-l-4
6. padding x-axis 4rem p-x-4
7. padding y-axis 4rem p-y-4