One section per page view added

Added single section per page view and hide future weeks from student
view
First working version for 2.4

Fixed breaks caused by changes to libraries between 2.3 and 2.4
Corrected version date and details

Placed correct version and requirements to add to Moodle Plugin database
Amended README to contain correct Moodle version
Merge pull request #2 from brum1975/Moodle_24

Moodle 24