Update Backbone and Underscore submodules.

jdalton · jdalton · commit 74a2d8dcb1a0 · 2012-05-26T00:12:43.000-04:00
Former-commit-id: 13de1bae42bbbae7ca138bc5d26b83fd66367343
diff --git a/vendor/backbone b/vendor/backbone
@@ -1 +1 @@
-Subproject commit 3c7c8d2f1af5ded3067324579ca6ff0f5dcb2893
+Subproject commit 5509e13842a4d8e9c2c2fd59d86492bbf6c0b596
diff --git a/vendor/underscore b/vendor/underscore
@@ -1 +1 @@
-Subproject commit 0da7b393b08c2459bc302f4ccb6401587b1fb1da
+Subproject commit 99d1023a8b0912d15215d186f580dafc27f2d04a
