Merge pull request #3 from Ichoran/master

Deliver nonzero exit code on test failure, and shows what methods aren't covered.
Merge branch 'master' of https://github.com/scala/scala-collections-laws

especially if it merges an updated upstream into a topic branch.
Merge pull request #4 from Ichoran/master

Added tests for Function1 and PartialFunction behavior of collections.
Merge branch 'master' of https://github.com/scala/scala-collections-laws