This function creates a list of all variables in the EV files
Examples
if (FALSE) {
#To be added - Needs Example data
#Starting Echoview
echoview = StartEchoview()
#Create a new EV File
EVFile <- EVCreateNew(EVAppObj=echoview, dataFiles = "rawfile.raw")$EVFile
Varname <- "Fileset 1: Sv pulse compressed wideband pings T1"
bottom <- EVBottomDetection(EVFile, EVVar=Varname, LineName="Bottom")
# Change the algorithm to Best bottom candidate
bottom <- EVBottomDetection(EVFile, EVVar=Varname, LineName="Bottom",algorithm=2)
}