added mandatory <Authors> property
added mandatory <Authors> property

iolevel/peachpie-concept,peachpiecompiler/peachpie,peachpiecompiler/peachpie,iolevel/peachpie,peachpiecompiler/peachpie,iolevel/peachpie-concept,iolevel/peachpie,iolevel/peachpie,iolevel/peachpie-concept