remove useless routes and views
remove ORCID integration
remove newrelic
remove ORCID scripts in layout
remove GA tracking
don't bundle gems to vendor/
don't use app.json config
remove solr and mongo
remove duplicated js
remove branding
upgrade Sinatra to 1.4

upgrade Sinatra to 1.4, which uses Rack::Protection 1.5 and should not
cause the problem
http://stackoverflow.com/questions/10509774/sinatra-and-rack-protection-
setting
fix gem versions and remove useless
refactor to use Crossref API and remove all useless staff