make sure callback is a function.
Use production settings for Heroku
Use Heroku env to config settings for production.
add a start_kpi.bash to run a 5 mins update
remove npm-debug.log
Merge pull request #11 from xiatao123/master

shell script start_kpi.bash added 
Only retrieve meta data when list stories, and then query each one on demand.
Remove log msg.
Merge branch 'master' of https://github.com/frankyanwang/SmartRead