Add 256x256 and 64x64 Beremiz icons


remove svg:midPointStop tags from icons.svg, because Inkscape
complained about unsupported tag. It seems that these tags were made
by Adobe Illustrator and aren't supported by any other app.

Vendor;product_code;revision_number;pdo_alignment;max_pdo_size;add_pdo
1573;1768449365;3;16;10;