[Travis] Use xcodebuild directly with xcpretty
[Travis] Use xcodebuild directly with xcpretty

smilypeda/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,tzongw/ReactiveCocoa,calebd/ReactiveCocoa,rpowelll/ReactiveCocoa,sandyway/ReactiveCocoa,Juraldinio/ReactiveCocoa,andersio/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,walkingsmarts/ReactiveCocoa,ohwutup/ReactiveCocoa,andersio/ReactiveCocoa,sandyway/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,andersio/ReactiveCocoa,ikesyo/ReactiveCocoa,rpowelll/ReactiveCocoa,victorlin/ReactiveCocoa,ikesyo/ReactiveCocoa,smilypeda/ReactiveCocoa,walkingsmarts/ReactiveCocoa,Juraldinio/ReactiveCocoa,calebd/ReactiveCocoa,victorlin/ReactiveCocoa,walkingsmarts/ReactiveCocoa,ohwutup/ReactiveCocoa,victorlin/ReactiveCocoa,ohwutup/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,rpowelll/ReactiveCocoa,calebd/ReactiveCocoa,tzongw/ReactiveCocoa,tzongw/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,smilypeda/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,Juraldinio/ReactiveCocoa,sandyway/ReactiveCocoa