added enrolled users, removed get_context()
big renaming
MDL-38304 moved editing functionality from course/search.php to course/manage.php
searching courses moved to renderer
added constants to displaycourses
correct rendering of list of tagged courses
MDL-37009 split html rendering into several functions, load content only if neede
MDL-37009 pagination support in view courses list
- MDL-38147 added caching to get_courses, removed usage of wmanagers
- MDL-38147 attempt to preload course contacts