Merged plot and graphics scripts.

commit c5cde0df3a089b7724f4c5aa003bbeb9d94c9de0
Author: David Russell <david.russell@revolutionanalytics.com>
Date:   Tue Nov 11 10:53:50 2014 +0700

    Added script to demonstrate graphics.

commit 8e26b0eb8e248e735d84d9ce169e2677466636b9
Author: David Russell <david.russell@revolutionanalytics.com>
Date:   Tue Nov 11 10:52:33 2014 +0700

    Added script to demonstrate plots.
Merge branch 'master' of https://github.com/themarchoffolly/revolution-r-timeseries