JPEGs can be stored in two parts - the tables and the image data. The key point being that multiple images in the SWF can all reference the same JPEG table to save space. There is only one of these things per SWF, so when writing images we need to take care to check that they all reference the same table. ISSUE 16: When writing, if we encounter a second table, then the image should be converted from a DefineBits to a DefineJPEG2 tag by inlining the table.
