expose interface for custom hash functions and murmur seeds
whitespace cleanup
document murmur3 seeding
document (not quite working) custom hash functions
fixup passing of Proc for seeded murmur
look! see!
do the real thing
Merge pull request #2 from ewdurbin/murmur_seed

allow instantiation of Cluster and RendezvousHash objects with custom murmur3 seed