Additional examples added displaying flexbox

- Fix to click script in main.js
Additional example of flexbox added shows it actually flexing
flex-wrap syntax examples add

- additional code examples provide for flexbox
- style changes to h3 in the .intro
Style updates to screen and sunburst css

- background gradient added to .code
- three corners with radius applied
- removed background color from sunburst.css
Update to global cursor style
Merge Resolution