Adding examples for license property.
sdopending while pending.
Scrubbed mention of 'asset' property (which never really existed) from distance property. Reworded slightly.
See also http://lists.w3.org/Archives/Public/public-vocabs/2014Jun/0126.html
Added Microdata and RDFa examples for every Role example.
Merge branch 'master' into sdo-mainentity

Conflicts:
	app.yaml