Create onboarding modal [Fixes #76917104]

![screenshot 2014-08-28 19 05 56](https://photos-4.dropbox.com/t/0/AADcj4Hzwy6EnKGqSC3n0zJhffHtiojM-Nlk92JBMwHFMg/12/74929777/png/1024x768/3/1409338800/0/2/Screenshot%202014-08-29%2013.43.22.png/tjzM1_1jShBFsiQ1pDaG5elq8zEljsy7w7feyv-1gAw)

ping @fatihacet