remove unused json-line-protocal for digg and meetup. Remove modified…

… config.js and add sample

config.js → config.sample.js

@@ -1,7 +1,7 @@
 var config = {};
 
 config.port = 8080;
-config.address = 'localhost';
+config.address = '127.0.0.7';
 config.twitter_username = process.env.TWITTER_USERNAME || 'my_username';
 config.twitter_password = process.env.TWITTER_PASSWORD || 'my_password';