Added lzma warning if extraction is attempted without the lzma module installed
Added lzma warning if extraction is attempted without the lzma module installed

pombredanne/binwalk,chubbymaggie/binwalk,devttys0/binwalk,itsens/binwalk,itsens/binwalk,devttys0/binwalk,pombredanne/binwalk,chubbymaggie/binwalk