Switching to TArrayViews in some instances
Adding magnitude and power spectrum methods.
Adding some array math routines.
#rb Ethan.Geller Aaron.McLeran Jimmy.Smith
#fyi Ethan.Geller
#ROBOMERGE-OWNER: phil.popp
#ROBOMERGE-AUTHOR: phil.popp
#ROBOMERGE-SOURCE: CL 8640932 via CL 8652557
#ROBOMERGE-BOT: (v414-8654207)
[CL 8656339 by phil popp in Main branch]