Link to QuartzCore framework explicitly rather than auto linking
Fail task when xcodebuild failed
Remove self pod dependency in Podfile

It causes "duplicate symbol" error in NAPlaybackIndicatorView project.
Update .gitignore
Allow to disable XCPretty with NO_XCPRETTY environment variable
Run tests on Travis CI
Work around broken RVM on OS X VM

https://github.com/travis-ci/travis-ci/issues/1879
Merge branch 'travis'
Show device name at the beginning of test tasks