Update for 5.0 branch (Improved support for custom meta fields in admin UI, course meta data now visible with the shortcode [tpcourseinfo], Fixed the handling of curly-brackets for the definition of surnames in author/editor names, Pagination is enabled by default for [tpcloud, tp_list]). This is teachPress 5.0alpha12.

git-svn-id: https://plugins.svn.wordpress.org/teachpress/branches/5.0.x@994035 b8457f37-d9ea-0310-8a92-e5e31aec5664