Sort keys in json output. Rework COMMAND-LINE-TOOLS.md.
Add Litecoin testnet, and Litecoin BIP32 prefixes.
Many changes.

Fix problem with block.py. Improve tx tool. Fix TxOut.hash160().
Improve Multisig. Improve PEP8. Make VM faster at handling multisig.
Add tx_cmdline_test.
Add the missing BIP32.txt file.
Add "blanked_hash" and tests.