add pre-build event
add pre-build event

haraldsteinlechner/FsPickler,FsUnity/Unity3d.FsPickler,FsUnity/Unity3d.FsPickler,nessos/FsPickler,cloudRoutine/Unity3d.FsPickler,cloudRoutine/Unity3d.FsPickler,mbraceproject/FsPickler,wallymathieu/FsPickler,wallymathieu/FsPickler,nessos/FsPickler,haraldsteinlechner/FsPickler