[fitsbits] 64-bit integers

[Thierry Forveille]

Arnold Rots writes:
 > If we are considering tinkering with the data types, at last, should
 > we consider including old unfinished business and add the unsigned
 > integers as well?  Such as:
 > 
If there is a sufficiently widespread feeling that the unsigned
discussion (which I personally consider a finished business) 
needs to be revived we could vote on it as well, but let's not mix
the two issues/votes. They really are separate, and should be dealt 
with separately.

Thierry