jedutil.c:  [Kevin Eshbach]
- Corrected the output of the PAL20X4, PAL20X8, PAL20X10 to show the XOR on the relevant sum of products.
- When viewing a device the size of the JED file is verified to match the size of the device.
- Replaced hard-coded symbol strings with constants.
- Started experimental work for supporting RICOH PAL’s.  (Currently ifdef'ed out.)
- Added support for viewing the following devices and the corresponding regression test data.
  (PALCE16V8, PAL10P8, PAL12P6, PAL14P4, PAL16P2, PAL16P8, PAL16RP4, PAL16RP6, PAL16RP8, PAL6L16, PAL8L14, PAL12H10, PAL12L10, PAL14H8, PAL14L8, PAL16H6, PAL16L6, PAL18H4, PAL18L4, PAL20C1 and PAL20L2)