downloader.nim: use new downloadFile proc
downloader.nim: use new downloadFile proc

dom96/Nim,dom96/Nim,dom96/Nim,russpowers/Nim,tulayang/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim,dom96/Nim,russpowers/Nim,russpowers/Nim,tulayang/Nim,tulayang/Nim,dom96/Nim,russpowers/Nim,tulayang/Nim,russpowers/Nim,tulayang/Nim,tulayang/Nim,dom96/Nim