Mention the usecase of Traceable/Untraceable.
Update to latest wpt
Added path space support (Fixes #2150)
Merge pull request #2663 from saneyuki/trace_comment

Mention the usecase of Traceable/Untraceable.
Merge pull request #2670 from fdipilla/ticket#2150

Added path space support (Fixes #2150)
Merge pull request #2669 from Manishearth/wpt_up

Update to latest wpt