First cut at a LearningResource definition.
First cut at a LearningResource definition.

The actual definitions are commented out to give LRMI folk a chance to review
rather than be surprised with this showing up in the Web.

/cc #1401

vholland/schemaorg,tfrancart/schemaorg,vholland/schemaorg,schemaorg/schemaorg,gkellogg/schemaorg,dbs/schemaorg,vholland/schemaorg,tfrancart/schemaorg,unor/schemaorg,gkellogg/schemaorg,gkellogg/schemaorg,schemaorg/schemaorg,vholland/schemaorg,tfrancart/schemaorg,tfrancart/schemaorg,schemaorg/schemaorg,dbs/schemaorg,unor/schemaorg,dbs/schemaorg,gkellogg/schemaorg,unor/schemaorg,dbs/schemaorg,schemaorg/schemaorg,schemaorg/schemaorg