tblkch.pdf comments

[hacker-volodya]

Review tblkch.pdf and put comments on things that differ from actual implementation.

[novusnota]

Here: https://beta-docs.ton.org/foundations/whitepapers/tblkch#4-4-4-the-initial-state-of-tvm, we should replace SETCODEPAGE with SETCP.

There could be other places with outdated instructions too :)

[hacker-volodya]

comment 4.4.9 as unimplemented (split/merge transactions)