#1301366 by dereine: Add a node_comment_statistics::last_comment_uid field, filter, argument and relationship

Revert "#1199328 by casey, bojanz: Add typehintings to every place which doesn't break the api. KUDOS"

This reverts commit 553f0e80.

#1301790 by rfay, dereine: Use created instead of timestamp for user.created field, and add some move definition

#1303398 by johnv: Some entities might have a certain field value just empty but it's set, which caused notices

#1307162 by cmurph: Check whether an argument is empty or not when loading the taxonomy term for the title

#1291658 by jackalope: Convert views_plugin_argument_default_taxonomy_tid to new return value of views_get_page_view

#1251052 by dereine: Add automatic conversions of joins to relationships for users_roles and role. Additional clean up comment/node author relationship