Replace the simple text reporter with TAP
Unfortunately the subtests feature is not in the Jenkins TAP plugin yet which makes it barely useful (https://issues.jenkins-ci.org/browse/JENKINS-18984)
Don't fail the whole suite when a single feature fails
Minor report.rb refactoring, fix the spec
Add "Bail out!" to tap output in case of an Instruments error
Merge pull request #32 from zucchini-src/tap_output

Tap output, closes #31