Move header/footer sass to `pages/home/`
Update .application sass layout rules
Use consistent background-color variables in home sass
Update `main` and `.content` sass for better mobile support
Huge update to navbar sass; add navbar toggle button for phones
Add workaround for iOS 7 landscape viewport scroll bug
Remove `overflow-y:scroll` on `.navbar-collapse`; gets rid of scrollbars
Add link-based scrolling to sections via navigation links
Add css class to navbar on scroll
Button click to open/collapse navigation menu on small screens