o Version 1.0: initial release
o Version 1.1: modified to throw exceptions instead of using R's error() func.
o 1/25/2006 --- Version 1.2
  Small change to RcppAPI.pdf
  Fixed Date in DESCRIPTION
o 1/29/2006 --- Version 1.3
  Added RcppAPI.pdf as a vignette.
  Thanks to Dirk Eddelbuettel for helpful tips.
