Adding submodule for multiverso

.gitmodules

@@ -1,3 +1,7 @@
 [submodule "Source/1BitSGD"]
 	path = Source/1BitSGD
 	url = https://git.codeplex.com/cntk1bitsgd
+[submodule "Source/Multiverso"]
+	path = Source/Multiverso
+	url = https://github.com/Microsoft/multiverso-next.git
+	branch = dev

Source/Multiverso

@@ -0,0 +1 @@
+Subproject commit 5d156d1aaba412725150b2341468f114deaa2c7e