Issue #681760 by agentrickard, Josh Waihi, Niklas Fiekas, catch, xjm, NaX, chx, pwolanin, garywiz: Fixed Try to improve performance and eliminate duplicates caused by node_access() table joins.

Issue #1415794 by Zen Master: Fixed node_access_test_form_node_form_alter() has wrong documentation header.

#898360 by sun, catch: Cache node types - saves 7% in MySQL in sites using memcache for caching backend

#963656 by agentrickard, bfroehle: Fixed critical bug node_access_view_all_nodes() is never invoked.

- Patch #860180 by chx, dixon_, jhodgdon: entity listing and loading does not allow for node access.