add listing short description liquid
update categorydrop text to name
append short descriptions spec in listing drop, listing model
remove dup short sandbox category, category drop
add short description drop spec
create social media tag
small refactor
Merge pull request #22 from yoolk/short_description

Short description
add rel nofollow to office url and update test
add predicate method to request_drop
Merge pull request #25 from yoolk/add_no_follow_to_office_link

add rel nofollow to office url and update test
merge master and resolve conflict