Added mathewes and pellatt to the bib file, started moving things around for the simple example.
Adding references, adding examples.
*  Added reference to Blarquez and to Power.
*  Added the 'simple' example.  Had to move a bunch of text from the Pinus example up to the simple example so that it read properly, but it seems to have worked.  Will compile and check it for errors.
name all code chunks and rebuild the md from Rmd
delete the redundant figures, many of which were obsolete