Test: tcl client, unset deferred var on close.
Test: Tcl client initial support for automatic reconnection.
Sentienl/Redis test: enable link reconnection in instances.tcl.
Test: use higher level redis.tcl proc to read replies.
Add Travis CI
Add automated testing for creating clusters

This script will run over 200 cluster creations
on different replica and instance counts.

It currently works on my OS X system and in a Linux VM.
It's designed to work on a CI server so it can just run
in the background and the system will report if the script
fails.
Add cluster bring-up testing to CI configuration
Add Redis cluster test to CI

The more tests the better!