added css for container div
added container div around all content in application layout file
added show single question template
Merge branch 'master' of https://github.com/Rleahy22/culture_overflow
changed user association on question model to author, class_name: user
changed root path from 'question' to 'questions' because we made all controllers plural
Added nav bar with 'home' link to application.html.erb
Merge pull request #22 from Rleahy22/newbranch

6 commits- see individual descriptions