Add link for JSConf.ey tickets info
Merge pull request #31 from mroderick/add-jsconf-ticket-link

Add link for JSConf.eu tickets info
Merge pull request #29 from uxebu/gh-pages

Add the JS CodeRetreat to js.fest site.
Add sign up button.
Merge branch 'gh-pages' of github.com:uxebu/jsfest.berlin into gh-pages