Added tests and tweaked Scaladoc for BeforeAndAfterEachTestData. Also deprecated the before/afterEach(TestData) methods
in BeforeAndAfterEach, and tweaked its Scaladoc.


git-svn-id: http://scalatest.googlecode.com/svn/trunk@4813 fd1274fd-080f-5963-8033-43ee40fcd1de