test data changed to include such data
2. Test a dimension of an array ( we support only one-dimension)

Oleg Bartunov

source data, improve split algorithm for intbig_ops.  Oleg Bartunov
with some kibitzing from Tom Lane.

commit Oleg and Teodor's RD-tree implementation ... this provides the
regression tests for the GiST changes ... this should be integrated into
the regular regression tests similar to Vadim's SPI contrib stuff ...