v0.6.4.2

[Tagged in preparation for 0.7.0 re-write release]
12-31-2015: Original Release date

• Upgrades the Ragios built-in url_monitor plugin to use excon gem instead of restclient gem.

• url monitors can now make http GET requests with a retry_limit (default is 3 times) and a connection timeout setting default is 60 seconds.
  Sample url monitor with new retry_limit and connect_timeout keys:

monitor = {
  monitor: "My Website",
  url: "http://mysite.com",
  every: "5m",
  contact: "[email protected]",
  via: "gmail_notifier",
  plugin: "url_monitor",
  retry_limit: 6,
  connect_timeout: 300
}