Use xz for dist
Use xz for dist

It has better compression.

sugarlabs/sugar-artwork,tchx84/debian-pkg-sugar-artwork,sugarlabs/sugar-artwork,sugarlabs/sugar-artwork,i5o/sugar-artwork,tchx84/debian-pkg-sugar-artwork,i5o/sugar-artwork,godiard/sugar-artwork,i5o/sugar-artwork,samdroid-apps/sugar-artwork,samdroid-apps/sugar-artwork,godiard/sugar-artwork,tchx84/debian-pkg-sugar-artwork,samdroid-apps/sugar-artwork,godiard/sugar-artwork