Added the binary versions of ztex_ufm1_15d4.ihx and ztex_ufm1_15y1.ihx
The files were converted with ihx2bin to make them directly usable
to download as mining firmware to the ztex board.
Firmware 15d4 support
Not yet using suspend and while we have fpga counting implemented it isn't being used yet, thus only the groundwork for quad board support is done, not actually working yet.