Update for 5.0 branch (Improved UI for assessment (edit/delete assessment, edit/delete artefact), Improved support for meta data fields for registration forms, several small bugfixes). This is teachPress 5.0alpha10.

git-svn-id: https://plugins.svn.wordpress.org/teachpress/branches/5.0.x@982527 b8457f37-d9ea-0310-8a92-e5e31aec5664