Update element mappings.
Update element mappings.

wienczny/polyup,davidmaxwaterman/polyup,davidmaxwaterman/polyup,googlearchive/polyup,tomalec/polyup,PolymerLabs/polyup,PolymerLabs/polyup,googlearchive/polyup,tomalec/polyup,wienczny/polyup,wienczny/polyup,tomalec/polyup,davidmaxwaterman/polyup,googlearchive/polyup,PolymerLabs/polyup