Update for 5.0 branch (New parameter show_tags_as added to [tpcloud], Initial implementation of tinyMCE-Plugin). This is teachPress 5.0alpha14.

git-svn-id: https://plugins.svn.wordpress.org/teachpress/branches/5.0.x@997949 b8457f37-d9ea-0310-8a92-e5e31aec5664