Checking in Chee Seng's updated branch adding contain matcher stuff to and or and not, or not, etc.
Cmd I used:

svn merge -r4840:HEAD https://scalatest.googlecode.com/svn/branches/cs-contain-matcher-2


git-svn-id: http://scalatest.googlecode.com/svn/trunk@4854 fd1274fd-080f-5963-8033-43ee40fcd1de