Merge pull request #7 from badboy/patch-1

Cluster is stable

Don't update slot -> node map for ASK redirection.

Use new CLUSTER SLOTS API to fetch Redis Cluster configuration.

consistency-test: write more often to a subset of keys.

keyslot() now implements hash tags.

Trap EACCES errors as well on connect.

Rate limit error messages in consistency-test.rb.

example.rb now optionally takes hostname / port as arguments.

consistency-test.rb now takes hostname / port as arguments.

consistency-test.rb: use key prefix to allow multiple instances.

Consistency test: count failed reads and writes.

First version of a cluster consistency test added.

Example modified to restart from where it left.

Ability to specifiy a timeout.