Add Evernote Sandbox provider JSON file
Allow empty oauth_token_secret on access_token request

According to Evernote’s developer documentation at http://dev.evernote.com/doc/articles/authentication.php “Evernote does not use the token credential secret” and will therefore always return an empty token.
Add Evernote trademarks attribution statement to license

According to http://evernote.com/trademark/ attribution of Evernote Corporation’s ownership of these marks must be provided by including this statement.
Add Evernote logo
Add Evernote provider for Evernote’s production servers
Merge branch 'master' into evernote-provider

+ fix "short_formats"

Conflicts:
	lib/oauth1.coffee

Signed-off-by: Arnaud Richard <a.richard@webshell.io>
LICENCE: notice for use of logos

Signed-off-by: Arnaud Richard <a.richard@webshell.io>