Added tests and support for U(1) group

tests/testU1.jl

@@ -0,0 +1,40 @@
+using LinearAlgebra, Random
+
+import Pkg
+#Pkg.activate("/lhome/ific/a/alramos/s.images/julia/workspace/LatticeGPU")
+Pkg.activate("/home/alberto/code/julia/LatticeGPU")
+using LatticeGPU
+
+
+T = Float32
+
+b = rand(U1{T})
+println(b)
+
+ba = rand(U1alg{T})
+println("Ba:        ", ba)
+b = exp(ba)
+println("B:         ", b)
+c = exp(ba, convert(T,-1))
+println(typeof(norm2(ba)))
+d = b*c
+println("Test:      ", d)
+
+c = inverse(b)
+println("Inverse B: ", c)
+
+d = b*c
+println("Test:      ", d)
+
+println("B:         ", b)
+println("Ba:        ", ba)
+b = expm(b, ba, convert(T,-1))
+println("Test:      ", b)
+
+
+Ma = Array{U1{T}}(undef, 2)
+rand!(Ma)
+println(Ma)
+
+fill!(Ma, one(eltype(Ma)))
+println(Ma)