update sql to get duplication without 'source+link' card
add place holder to wikirate_link
skip checking duplication if link is empty
singularize folder names
fixed rspec default-path (mods to mod)
Merge remote-tracking branch 'henry/webpage_deplication_check'
Merge remote-tracking branch 'henry/add_placeholder_to_wikirate_link'
ticked up wagn version