[NEW]
* Pull-to-refresh on the dashboard and the athlete list

[CHANGED]
* Improved AthleteDetailsView design: make better use of space by only using half the
  screen height for image, redesign date of birth/country layout

[FIXED]
* Athlete name in details view not aligned to the left when expanded (#6)
* Keyboard not shown in athlete search field (#13)
* No error shown when network and no cached data available (#14)
