Issue #1641904 by dawehner: Convert views_join to PSR-0 files.

handlers/views_handler_relationship.inc

handlers/views_handler_relationship_groupwise_max.inc

handlers/views_handler_sort_menu_hierarchy.inc

help/api-tables.html

includes/handlers.inc

lib/Drupal/views/Join.php

lib/Drupal/views/JoinSubquery.php

...les/comment/views_handler_field_ncs_last_comment_name.inc

modules/comment/views_handler_sort_ncs_last_comment_name.inc

modules/field/views_handler_relationship_entity_reverse.inc

modules/node.views.inc

modules/search/views_handler_argument_search.inc

modules/search/views_handler_filter_search.inc

...es/taxonomy/views_handler_relationship_node_term_data.inc

...es/translation/views_handler_relationship_translation.inc

plugins/views_plugin_query_default.inc