Cleaned up the CSS, changed some layout to bootstrap elements
More CSS structuring

# By sophiewesslau
# Via sophiewesslau
* 'master' of https://github.com/Iteam1337/iteam-se.docpad:
  background-size: cover Changed
  body background image changed
  no-repeat center fixed
  Background image changed

Conflicts:
	src/documents/styles/style.css.styl