Add vector/matrix_temporary_type

Fix Iterator::reference must be the actual operator* return type
Fix scalar assign must account for temporay value_type


[SVN r25327]

libs/numeric/ublas

@@ -1 +1 @@
-Subproject commit 96ed78a66fb90cd4de3f16f5db95e19b1188b08f
+Subproject commit 0b18a99b1c1a707490d9fde3568e0e1f77d32d7b