Added git modules file

.gitmodules

@@ -0,0 +1,6 @@
+[submodule "flow-ui"]
+	path = flow-ui
+	url = http://github.com/hexasoftware/flow-ui
+[submodule "flow"]
+	path = go/src/github.com/hexasoftware/flow
+	url = http://github.com/hexasoftware/flow