created app.json to configure app itself
fixed style sheet in desktop view
extracted sidebar and topnav
Merge branch 'master' of github.com:jmandala/bootstrap-doc-starter

Initial merge with github.
+ pre-responsive-style.styl: made pre-responsive-styles use stylus features
+ app.js: removed app.json from repo and added app.json.sample which will create a default app.json the first time it runs
Update README.md