entity 7.x-1.8

Changes since 7.x-1.7:

• #2323619 by Weaver, lex0r, a.milkovsky, fago: Improve entity_metadata_taxonomy_access to cover existing permissions
• #1874006 by fago: Expose entity references as CTools relationships
• #1989444 by nuez, djdevin: Views integration for properties of type = duration does not work
• #1621002 by grahl, valderama, mfb, fago: Fix typo in comment of entity_metadata_node_entity_property_info_alter().
• #1621002 by grahl, valderama, mfb, fago: Cardinality breaks node indexing on main body
• #2448151 by Aleksander Belov, alesr, joelpittet: Speed up feature revertion of entity exportables
• #2512744 by rrfegade, joelpittet: Typos and Spelling - D7
• #1986736 by tedbow, ciss, coline: EntityDefaultFeaturesController doesn't export field instances. Breaks export with Features 2.x
• #2445881 by plopesc, e0ipso: Remove extra space in Entity UI table
• #1621226 by joachim, DuaelFr, cthiebault, fago: Entity Metadata Wrapper: Add field information to exception message on validation exception
• #2476821 by znerol, ladybug_3777, jmouse888: Array flip errors when books are not part of a book hierarchy. --author="znerol