Issue #1154382 followup by plach: Fixed several issues with the newly-added hook_entity_view_mode_alter().

Issue #1154382 by Berdir, barraponto, acouch, swentel, LoMo, DamienMcKenna, chx: Fixed View mode no longer can be changed.

Issue #1410260 by swentel, mojzis, droplet, pingers, drupdan3: Fixed rss.xml/whatever triggers PHP error.

Issue #1728568 by e2thex, oriol_e9g: Fixed Add table alias in node query conditions to avoid ambiguous fields.

Issue #1571104 by BTMash, Dave.Ingram, mradcliffe, Damien Tournoud, sun, lliss, tim.plunkett | lkiss80: Fixed Can't access non-node entities with EntityFieldQuery.

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.

Revert "Issue #1058564 by Niklas Fiekas, droplet, grendzy, dixon_, naxoc: Fixed User picture does not appear in comment preview."

This reverts commit 186437d3.

Issue #1058564 by Niklas Fiekas, droplet, grendzy, dixon_, naxoc: Fixed User picture does not appear in comment preview.

Revert "Issue #1074672 by claudiu.cristea, mikewink: Added Allow language select to be rearranged inside node form."

This reverts commit f4791b9c.

Issue #1074672 by claudiu.cristea, mikewink: Added Allow language select to be rearranged inside node form.

Issue #1227396 by chris.leversuch, jhodgdon: Document that hook_node_access() is not called on node listings.

Issue #1345480 by chris.leversuch, rbayliss: Fixed node_load() does not document FALSE return value.

Issue #1264894 by Devin Carlson, James_Stallings: Fixed The 'Parameters' section shows HTML tags are rendered as plain text.

Rollback of #1174602. This is a clean-up patch rather than a bug fix, and could have implications in contrib.

Issue #1164852 by plach: Default the 'translatable' bit on fields to FALSE for fields created in the UI, to match those created by the API.

Issue #1181576 by James_Stallings: Fixed node_get_recent() doc needs to clarify what 'recent' means.

Issue #705892 follow-up by bfroehle, ELC: Safer method of instantiating the content variable in node.tpl.php.

Issue #1153022 by lyricnz, Pasqualle: Fixed PHP Notice: Undefined index: content in template_preprocess_node().