Switch from wget to curl for downloads
Switch from wget to curl for downloads

May solve issues like https://github.com/Hexxeh/rpi-update/issues/65

JackDanger/rpi-update,shaun10/rpi-update,lurch/rpi-update,vinodpanicker/rpi-update,c0d3z3r0/rock-update,Gouthamve/rpi-update,TwizzyDizzy/rpi-update,shrx/rpi-update,Hexxeh/rpi-update