fix: signal in test
convert print statements
PEP-8 compliance for test.py
add: Unique Identifier now is 512-bit hash
Merge branch 'master' of github.com:ethereum/pyethereum
fix: node_id instead of network_id
local config and peer files. ignore own node id.
Merge branch 'master' of github.com:ethereum/pyethereum

Conflicts:
	pyethereum/eth.py