Create a Checkpoints trait.
Updated Checkpoints trait to support JUnitTestFailedError.
Merge branch 'jira-127' of https://github.com/gcberger/scalatest
Added shouldBe support to inspector shorthands.
Added test to check for null in ShouldNotShorthandSpec.scala.
Merge branch 'shouldBe-inspectors' of https://github.com/cheeseng/scalatest