wallet.getUnspentOutputs includes the pending field
wallet: rename utxo.receive to utxo.from
wallet: do not overestimate fees when network has dustSoftThreshold
wallet: do not delete pending incoming tx from outputs
Merge pull request #219 from weilu/utxo

Wallet fee & utxo fixups
ECSignature: compress assertion statement
ECSignature: add missing tests for R,S length
Merge pull request #220 from dcousens/canonical

ECSignature: fixes for canonical signatures
ECKey: remove extraneous toString
package: sort lists
ecdsa: adhere strictly to RFC6979

The previous impl. was in breach of the following section:

> Please note that when k is generated from T, the result of bits2int is
> compared to q, not reduced modulo q. If the value is not between 1 and
> q-1, the process loops.
> Performing a simple modular reduction would induce biases that would be
> detrimental to signature security.
ecdsa: less constant redefinition
ecdsa: ecurve 0.10.0