First draft of javascript-modules doc.
Refactor all the things.  Reads much nicer, now.
Add some text to the intro to answer the "Why modules?" question.
Add SIDEBAR.md
First draft of Understanding JavaScript Package Managers.
Add links to main README
Use 'bower search' and 'npm search'.
Fix typo. functions->function
Call the .json files 'metadata' files and clarify how to add packages intothem and what you can do with them.
Merge pull request #5 from spring-guides/javascript-modules

Add understanding docs for JavaScript modules and JavaScript package managers