Responsive demo

First row of charts updated to display different layout and items at
different screen sizes
Responsive update

Display for large screens removed
Demo on Annotator on home page

Requires server side to store comments
Revert "Demo on Annotator on home page"

This reverts commit 49f2a5c2fffbe0ca986963aac0124e6664a5551b.
Revised ons-charts.js

Removed hack to fix svg overflow; Applied css.
Updated readme