latest changes before branch

lib/noah/agent.rb

@@ -2,6 +2,7 @@ $:.unshift(File.expand_path(File.join(File.dirname(__FILE__), "..", "lib")))
 require 'rubygems'
 require 'noah'
 require 'noah/agents/http_agent'
+require 'noah/agents/https_agent'
 require 'noah/agents/dummy_agent'
 begin
   candidates = []

lib/noah/agents/https_agent.rb

+require File.join(File.dirname(__FILE__), 'http_agent')
+module Noah::Agents
+  class HttpsAgent < HttpAgent
+    PREFIX = "https://"
+  end
+end

lib/noah/models/watchers.rb

-require 'digest/sha1'
 module Noah
   class Watcher < Model
     include WatcherValidations