SERVER-13638: move touch into appropriate layers
SERVER-13638: remove unused NamespaceDetails reference
SERVER-13638: hide NamespaceDetails from dump
SERVER-13638: add Collection::appendCustomStats
SERVER-13638: remove some namespace_details include
SERVER-13638: remove NamespaceDetails from deprecated queryutil
SERVER-13638: move DurTransaction closer to lock
SERVER-13638: document touch