major updates - extra content, added paypal for sponsors, added top raffle prize

- Improved page load speed
- Ensured content to be mobile-responsive
- fixed facebook link/unclosed anchor tag issue
- added flyer and link for printable "Sign Up" PDF
- added and linked printable "Sponsorship Opportunities" PDF
- added "top raffle prize" to modal pop-out
- added paypal drop-down for different levels of sponsorship