Updated Index.js to get linkedin connections

Code should now return linkedin connections to the browser.

Next step is to save connection info to json files. Also need to save
users social stream.
Merge Sahir Updates, resolving util.js to master version
Moving credential store to libs, adding filesystem backed impl
Re-factor index.js into usable modules, working with linkedin.js fix
Adding secret.json to .gitignore to prevent inadvertent check-in