Tables: Relative row references may now cross hlines
A relative row reference like @-1 in a table may now reach across a
horizontal separator line. I hope this will not break any important
tables out there, but I think it is the right thing to do.
The original reason for not-crossing was to implement running
averages of one column in the next. This can now be done using field
formulas near the beginning and end of the column, and a column
formula for the central part.
See the variable `org-table-relative-ref-may-cross-hline' for more
details.