Update README.md

Link broken
* [GDG DevFest Instanbul 2014](http://devfesttr.com/)
Update README.md

working now
Update style.css
Update style.css
Include the color in transition for names

gives a softer effect when hovering.
Update hero.html

Link should wrap button, not just text.
Merge pull request #6 from joshuawoodward/master

background size fix
CSS files converted to Sass. Some style fixes. Created file with sponsors.
Update README.md
Updated ReadMe
Merge pull request #7 from gdg-x/develop

Add Sass support, sponsor generating from file, css fixes
jumbotron fixes in hero section.
Merge branch 'master' of https://github.com/gdg-x/zeppelin