Makefile update changes in R-Basics.Rnw
add CC BY-SA and TM line to last slide
misc updates and msnset figure
quick overview of ExpressionSet in ccl
fix pck verion nunbers and stangle all Rnw into single R
improve last addition
Merge commit '211e0b35b0f0036c41094dc2a539a2e1d7e31140'
clarify calling ExpressionSet man
Merge commit '9477159ddc2afea0ef128883f543c2d6f9b03ce5'