Added screencasts section
added Screencasts on the  menu wrapper
update normalize.css to v3.0.0, change log: https://github.com/necolas/normalize.css/blob/master/CHANGELOG.md

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Merge pull request #106 from appleboy/develop

update normalize.css to v3.0.0
Merge pull request #107 from alissonbovenzo/latest

Added screencasts section
target="_blank" on egghead link
added transform css on images #screencasts
correct css for h1
Merge pull request #110 from alissonbovenzo/latest

Correct CSS for Screencasts section and fix bug opacity