Add iOS 7 app icon.
Add tab bar icons (by VisualPharm http://www.visualpharm.com)
Add Main.strings file (en version)
Update Main.strings files (it & en).
Create in storyboard two new sections (TalkLab and Workshop).
Merge branch 'master' of https://github.com/AppsterdamMilan/Appsterdam

# By Alessio
# Via Alessio
* 'master' of https://github.com/AppsterdamMilan/Appsterdam:
  Update README.md