Changed a few minor things that needed to be adjusted, style-wise

- Finally changed all the social media links to the actual accounts
  of SLCC.
- Changed the font size of the slogan. This size works much better
  on Internet Explorer. The aliasing around the edges is taken out
  completely!
- Added the real URL to the "apply now" button in the header.

Signed-off-by: Elliot Voris <elliotfriend@gmail.com>