strip leading slashes from path in JarElement::find()/exists()
strip leading slashes from path in JarElement::find()/exists()

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