Go with the devtools() format in the DESCRIPTION file
jsOpts -> chartOpts in iplotPXG; fill out options
Makefile: run all roclets in devtools::document()
Small change in documentation for iplotPXG
Revise chartOpts in curves_w_2scatter to use simpler system

 - Use the direct approach that I'd used in iplotPXG. This saves a ton
   of effort on the coffeescript side.
Small change in iplotPXG documentation