Verify library path exists
Verify library path exists

Makes sure the Sitecore Library path actually exists before copying the
libs. This prevents an invalid path  from causing a silent error when
building gulp.

nurunquebec/Habitat,zyq524/Habitat,nurunquebec/Habitat,GoranHalvarsson/Habitat,GoranHalvarsson/Habitat,zyq524/Habitat,ClearPeopleLtd/Habitat,ClearPeopleLtd/Habitat