Start putting together the losses

tests/tools/.#test_losses.py

@@ -0,0 +1 @@
+abe@paulsimon.2556:1553086360

tests/tools/test_losses.py

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+from __future__ import division, print_function, absolute_import
+
+from CDTools.tools import losses
+from CDTools.tools import cmath
+import numpy as np
+import torch as t
+
+
+def test_amplitude_mse():
+    pass
+
+def test_intensity_mse():
+    pass
+
+def test_poisson_ml():
+    pass