worked on tabs component

	modified:   assets/config/global_config.js
	modified:   assets/config/site_config.js
	modified:   assets/css/sherpa-site-styles.css
	modified:   assets/js/sherpa-site.js
	modified:   assets/sherpa/config/core_config.json
	modified:   assets/sherpa/lib/sherpa-notes.js
	modified:   assets/sherpa/sherpa.js
	deleted:    components/alerts/README.md
	deleted:    components/alerts/alerts.js
	modified:   components/tabs/tabs.html
	modified:   grid.html
	modified:   index.html
	modified:   pages/sherpa-site/components.html
turned off notes on site