Droped container reference requirement -

this is a significant source of inefficiency


[SVN r25162]

libs/numeric/ublas

@@ -1 +1 @@
-Subproject commit 5850c07f208432f53157a6226c035a54a3e4016c
+Subproject commit f3de4f9948d614e6e23afc598a7e64e94230cfe0