Merge pull request #109 from invenia/ep/Adjoint

Make adjoint compatible with scalars

src/sensitivities/linalg/generic.jl

@@ -7,6 +7,7 @@ unary_linalg_optimisations = [
     (:det,        ∇Array,  ∇Scalar, :(Y * Ȳ * transpose(inv(X))),        (_ϵ, ub)),
     (:logdet,     ∇Array,  ∇Scalar, :(Ȳ * transpose(inv(X))),            (_ϵ, ub)),
     (:transpose,  ∇Array,  ∇Array,  :(transpose(Ȳ)),                     (lb, ub)),
+    (:adjoint,    ∇Scalar, ∇Scalar, :(adjoint(Ȳ)),                       (_ϵ, ub)),
     (:adjoint,    ∇Array,  ∇Array,  :(adjoint(Ȳ)),                       (lb, ub)),
     (:norm,       ∇Array,  ∇Scalar, :(Ȳ ./ Y .* abs2.(X) ./ X),          (lb, ub)),
     (:norm,       ∇Scalar, ∇Scalar, :(Ȳ * sign(X)),                      (lb, ub))