Transaction: improve hash length checking + tests
Network: use capitalization
Merge pull request #216 from dcousens/addrser

Network: use capitalization
Merge pull request #214 from dcousens/txtests

Transaction tests
wallet: Move dust and fee per kb into networks.js
Fix bitcoin dustThreshold and feePerKb values
Move fee estimation into networks.js
Add fee estimation functions for dogecoin and litecoin
Network specific constants reference the latest tags
Network estimateFee tests no longer relies on fixtures
Merge pull request #215 from weilu/feendust

Fee and dust
network: testnet should use testnet
Transaction: remove signing operations
txbuilder stuff