Add stub for comparison.adoc
Add stub for comparison.adoc

... so links aren't left hanging.
zongweil/open-location-code,google/open-location-code,zongweil/open-location-code,bocops/open-location-code,google/open-location-code,bocops/open-location-code,zongweil/open-location-code,bocops/open-location-code,bocops/open-location-code,bocops/open-location-code,zongweil/open-location-code,google/open-location-code,bocops/open-location-code,bocops/open-location-code,google/open-location-code,google/open-location-code,zongweil/open-location-code,zongweil/open-location-code,bocops/open-location-code,zongweil/open-location-code,bocops/open-location-code,zongweil/open-location-code,google/open-location-code,bocops/open-location-code,zongweil/open-location-code,bocops/open-location-code,google/open-location-code,google/open-location-code,google/open-location-code,google/open-location-code,zongweil/open-location-code,zongweil/open-location-code,google/open-location-code