Update gem updater script to support RubyGems 2.x
Update gem updater script to support RubyGems 2.x

lsegal/rubydoc.info,lsegal/rubydoc.info,lsegal/rubydoc.info,docmeta/rubydoc.info,docmeta/rubydoc.info,docmeta/rubydoc.info,docmeta/rubydoc.info