update sketchup to v2014 and add sketchupviewer

sketchup has 3 products, make, pro and viewer
see http://www.sketchup.com/download/all
update to latest 2014 version
add sketchupviewer
pro will be added to versions repo
Merge pull request #5090 from jconley/sketchup

update sketchup to v2014 and add sketchupviewer