Rename config.js into config.js.example

That will give ability of direct update from git without touching customized config.js file

.gitignore

@@ -4,3 +4,4 @@ node_modules
 *.swo
 data
 *.DS_Store
+config.js

README.md

@@ -29,7 +29,7 @@ STDOUT.  Check the README there for more details and usages.
 ## Installation
 
 1.  Download the package, and expand it
-2.  Explore the settings inside of config.js, but the defaults should be good
+2.  Explore the settings inside of `config.js.example` and save it as `config.js`, but the defaults should be good
 3.  `npm install`
 4.  `npm start`