v1.1 Update

I've made a few revisions to this tool based on user feedback!

• Classes are now split into tabs, which are pre-sorted by spell level then name.
  • Changes have been made to the navigational bar across the top to allow for easier sorting as well.
• Buttons are now linked to their respective tab URLs.
• I've created a new instructional video on how to copy into your own drive and update the button links.