Added logout route and KS ajax query
public/js/user.js

Error messages displayed next to the fields, blink
Added color on error message
public/css/application.css

Merge user interaction into nav bar view
app/views/_nav.erb
Added navbar to the layout
app/views/layout.erb

Remove old login ajax calls
public/js/application.js

Deleted app/helpers/README & app/models/README --build in skeleton useless files