R: PBSmapping vignette -- links

## Links of interest to PBSmapping

PBSmappingIntro.pdf
  Introduction to PBSmapping
PBSmapping-UG.pdf
  PBSmapping User's Guide
Nicholas M. Boers
  C-code guru behind PBSmapping
ChangeLog.txt (PBSmapping)
  Incremental changes to the package by version
Pacific Biological Station
  Pacific Biological Station, Nanaimo, British Columbia, Canada
Maurice Lamontagne Institute
  Maurice Lamontagne Institute, Mont-Joli, Quebec, Canada
Grant MacEwan Computer Science
  Computer Science, Grant MacEwan University, Edmonton, Alberta, Canada
Seafloor Topography
  Seafloor Topography, Scripps Institute of Oceanography, U. California San Diego, La Jolla, California, USA
Clipper2 - Polygon Clipping and Offsetting Library
  Developed and maintained by Angus Johnson, Australia
PBSmapping (GitHub)
  Development site for PBSmapping
PBSmapx (GitHub)
  Development site for PBS Map Explore GUI to PBSmapping
PBSsatellite (MacEwan)
  User's guide to PBSsatellite (uses PBSmapping)