provide more useful message when throwing exception from Field.set
provide more useful message when throwing exception from Field.set

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