[daip] History we ought to be able to escape

[Bill Cotton]

Eric,

   Thanks,  this should help reduce the confusion when these things
come back at an inopportune time.

-Bill

Eric Greisen writes:
 > I have changed FITAB so that it no longer writes all the HISTORY AIPS
 > cards and have changed UVLOD to be smart enough to handle the
 > complicated UV table header and recreate the UV file as needed.  I
 > added to UVLOD and IMLOD a counter that causes the last non HISTORY
 > AIPS card to prevail over any HISTORY AIPS card.  The changes were
 > also migrated to FITLD's copies of UVLOD and IMLOD.
 > 
 > Eric Greisen