replace hasMoreThanOneSite with uniqueSite; rename Value fields
replace hasMoreThanOneSite with uniqueSite; rename Value fields

uniqueSite also checks, if applicable, to see if the second word of a
value shares the specified site with the first value as its sole site.

Also renamed a couple of fields in Value for clarity.

joshuawarner32/avian,lostdj/avian,ucdseniordesign/avian,dicej/avian,bgould/avian,bigfatbrowncat/avian-pack.avian,lwahlmeier/avian,badlogic/avian,lwahlmeier/avian,marcinolawski/avian,getlantern/avian,getlantern/avian,dicej/avian,badlogic/avian,bgould/avian,MaartenR/avian,minor-jason/avian,bgould/avian,joshuawarner32/avian,minor-jason/avian,marcinolawski/avian,joshuawarner32/avian,lostdj/avian,getlantern/avian,getlantern/avian,dicej/avian,minor-jason/avian,badlogic/avian,minor-jason/avian,MaartenR/avian,lostdj/avian,bigfatbrowncat/avian-pack.avian,dicej/avian,joshuawarner32/avian,bigfatbrowncat/avian-pack.avian,ucdseniordesign/avian,bigfatbrowncat/avian-pack.avian,lwahlmeier/avian,marcinolawski/avian,badlogic/avian,MaartenR/avian,lwahlmeier/avian,MaartenR/avian,marcinolawski/avian,ucdseniordesign/avian,ucdseniordesign/avian,bgould/avian,lostdj/avian