Avoid inverting matrices in EigenAnalysis

[juliohm]

We can be more clever and avoid inversions of S here:

TableTransforms.jl/src/transforms/eigenanalysis.jl

Lines 38 to 48 in 1841f05

	function drsproj(λ, V)
	Λ = Diagonal(sqrt.(λ))
	S = V * inv(Λ)
	S, inv(S)
	end
	function sdsproj(λ, V)
	Λ = Diagonal(sqrt.(λ))
	S = V * inv(Λ) * transpose(V)
	S, inv(S)
	end

We should be able to express these inverses by swapping the order of the products and by transposing the matrices instead.