Added doc about chain policy.
Fix upgrade for missing chain_policy.
Added package Abe.Chain to setup.py.
Merge pull request #127 from morinpa/master

missing value
Issue #115: Issue 404 HTTP headers for malformed and unseen addresses.
Example with datadir decimals option.
Abstract binary-hex conversion for eventual Python 3 port.
Test out-of-order bug in _populate_block_txin.
Fix out-of-order bug in _populate_block_txin.
Merge pull request #1 from bitcoin-abe/master

updating