Replace usage of BigInteger.compareTo(BigInteger.ZERO) with BigInteger.signum() as it's easier to read and more performant. Passes all unit tests.
Merge pull request #11 from schildbach/refactor-signum

Use BigInteger.signum() rather than .compareTo(ZERO)
SeedPeers gets peer info from seeds.txt resource

* Modify SeedPeers to read entire resource in to array.
* Remove dependencies on old implementation from unit tests.

See Google Code Issue #457
Merge branch 'master' into msgilligan-issue457