[schema-course] Schema for educational programs

Hello all,

For info: some new schema.org terms are being suggested that are 
relevant to educational courses. They are a type for 
EducationalOccupationalProgram and some associated properties. Please 
see the conversation at 
https://github.com/schemaorg/schemaorg/issues/2289 and have your say there.

Regards, Phil.

-- 

Phil Barker <http://people.pjjk.net/phil>. http://people.pjjk.net/phil
CETIS LLP <https://www.cetis.org.uk>: a cooperative consultancy for 
innovation in education technology.
PJJK Limited <https://www.pjjk.co.uk>: technology to enhance learning; 
information systems for education.

CETIS is a co-operative limited liability partnership, registered in 
England number OC399090
PJJK Limited is registered in Scotland as a private limited company, 
number SC569282.