Rename 'about' to 'info'

About page will be about TraitDB, info will be info about datasets
Generated AboutController, initial content
Add credits, publications, contact sections
Minor content edits
Move project picker  to right side of navbar
Change root url to redirect explicitly
Minor content tweaks on about page
Redirect to project info instead of root
About page tweaks from Hilmar's comments
Merge pull request #200 from NESCent/about-page

About page