This is OmniAuth strategy for authenticating to Evernote.
Usage
By default the strategy uses http://www.evernote.com site. In development you'll want to use https://sandbox.evernote.com instead. To do it you'll
need to pass site option:
use OmniAuth::Builder do
provider :evernote, ENV['EVERNOTE_KEY'], ENV['EVERNOTE_SECRET'], :client_options => { :site => 'https://sandbox.evernote.com' }
end