[R] New version of plotrix

[Jim Lemon]

Hi folks,

I usually don't do version announcements, but several people have 
requested things that are in this version (2.1). Prominent among these 
are that soil.texture has inflated into yet another general triangle 
plot function (triax.plot), the dreaded shadow effect has materialized, 
pie3D has lost a couple of bugs and by a sequence of improbable 
coincidences another wind rose plot is airborne, this one in the 
Australian style. As always, please tell me where I've blown it, for 
your comments have often gotten me on a better tack.

Jim