Travis: use cached RVM
Travis: use cached RVM

rhomobile/rhodes,watusi/rhodes,watusi/rhodes,watusi/rhodes,watusi/rhodes,rhomobile/rhodes,rhomobile/rhodes,rhomobile/rhodes,rhomobile/rhodes,watusi/rhodes,rhomobile/rhodes,rhomobile/rhodes,watusi/rhodes,watusi/rhodes,watusi/rhodes,watusi/rhodes,rhomobile/rhodes,rhomobile/rhodes,rhomobile/rhodes,watusi/rhodes