improve efficiency of multilayered indirect blocks
clean up tests
panic cleanup
clean up logic, improve readability
add final root node to the dagservice upon creation
importer: simplified dag generation
test: updated hashes using latest code
@whyrusleeping this is why the sharness tests
were failing: the hashes are added manually to
make sure our generation doesn't change.
cleanup after CR
fix merkledag tests
fix small block generation (no subblocks!)
The splitter is simplified using io.ReadFull, as this function
does exactly what we wanted.
I believe io.ErrUnexpectedEOF should be handled as an EOF here,
but please correct me if I'm wrong.
