getEdist: This is just a way of initializing the distance matrix...
In tcarruth/SSES: Spatial Social Ecological Systems

This is just a way of initializing the distance matrix between pop centres and lakes as the Euclidean distance.

1	getEdist(xfrom, yfrom, xto, yto, nmanage, CVd, stand)

`xfrom`	a vector of longitudes of some points e.g. pop centres
`yfrom`	a vector of latitudes of some points e.g. pop centres
`xto`	a vector of longitude of some other points e.g. lakes
`yto`	a vector of latitudes of some other points e.g. lakes
`nmanage`	the number of alternative management options under investigation
`CVd`	the CV on lognormal distances (for added stochasticity)
`stand`	Boolean: should all distances be standardized to mean 1