changing the readme to match the docker script for etcd
Part 1 of issue #34, not integrated with the coordinator yet
adding more comments
Merge pull request #43 from lytics/heartbeat_ttls

Part 1 of issue #34, not integrated with the coordinator yet
adding support for TTL refreshing, Coordinator.Release(), and failed-node recovery
closes #32
Fixing insure vs. ensure.
Merge pull request #45 from lytics/heartbeat_ttls

The etcd coordinator now supports task refreshing and released tasks.
Merge branch 'master' into commands

Conflicts:
	m_etcd/coordinator.go