Add Algebra and train helpers and proxy them to CNNMH

Summary: Add Algebra and train helpers and proxy them to CNNMH

Reviewed By: salexspb

Differential Revision: D4855040

fbshipit-source-id: d948ea913f674a6e47c4b72629a2d33253cb3130

caffe2/python/helpers/algebra.py

@@ -0,0 +1,21 @@
+## @package algebra
+# Module caffe2.python.helpers.algebra
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+__all__ = [
+    'Transpose',
+    'Sum',
+]
+
+
+def Transpose(model, blob_in, blob_out, **kwargs):
+    """Transpose."""
+    return model.net.Transpose(blob_in, blob_out, **kwargs)
+
+
+def Sum(model, blob_in, blob_out, **kwargs):
+    """Sum"""
+    return model.net.Sum(blob_in, blob_out, **kwargs)