Fix problem parsing tx ce7d73cba662a...d08660.
Fix syntax error in block.py script.
Add a new (failing) test.
Fix new test.
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.
Fix typo in BIP32.txt.
Fix address prefix values for LTC mainnet and testnet
Merge pull request #49 from fluxism/ltc-prefix-fix

Fix NetworkValues prefixes for litecoin
Add https://github.com/fluxism to CREDITS.
Fix test.
Add a default network to dump_block.
Add BlockChain, ChainFinder and tests.
Add blockchain info to Spendable.
Move some pycoinnet message parsing code to pycoin.
Don't go to gpg to generate entropy, as it doesn't work reliably
on travis-ci.
Added viacoin support