Bootstrap and Front End

[avabrooks]

• [x] Rework nav bar(make prettier)
  • [x] new sassy code
  • [x] new color scheme
  • [x] Fix Logo and blending with nav bar
• [x] Bootstrap layouts
• [x] Double check site wide styling
• [x] 3 functional front end pages
  • [x] login
  • [x] signup
  • [x] home page
  • [x] tutors page(eventually pull from db)
• [x] Unit 3 FRQ