Examples

test1.c: Test ST with shell matrices.
test2.c: Test ST with one matrix.
test3.c: Test ST with two matrices.
test4.c: Test ST with four matrices.
test5.c: Test various ST interface functions.
test6.c: Test STPRECOND operations.
test7.c: Test ST with one matrix and split preconditioner.
test8.c: Test ST with two matrices and split preconditioner.
test9.c: Test ST with four matrices and split preconditioner.