IRC bot providing URL previews

• Run make
• Edit earl.conf to your liking
• Run ./earl.pl

• Create an application at https://dev.twitter.com/apps
• Get an application auth token using your consumer credentials:

curl -u $key:$secret -d grant_type=client_credentials https://api.twitter.com/oauth2/token

• confirm that token_type is bearer
• set twittertoken in earl.conf to the contents of access_token