makefile cleanups
makefile cleanups

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