Set up css classes, started header design, user index design
Added more scss for buttons
Made site name a link to root, set root as users#index
Put user related forms in wrapper
Refactored design code, built and designed errors partial
Users#create action now displays errors properly
Fixed test expectations regarding link names
User controller handles errors and flashes correctly  now
Added _flash which dynamically accepts a class, rendered application.html
Created colors and css classes needed for flash messages