Fixed stack overflow when runners produce a lot of non-Hydra console output.

test/fixtures/many_outputs_to_console.rb

@@ -0,0 +1,9 @@
+#!/usr/bin/env ruby
+
+10000.times do 
+  $stdout.write "A non-hydra message...\n"
+  $stdout.flush
+end
+
+$stdout.write "{:class=>Hydra::Messages::TestMessage, :text=>\"My message\"}\n"
+$stdout.flush

test/ssh_test.rb

@@ -11,4 +11,15 @@ class SSHTest < Test::Unit::TestCase
     assert_equal "Hello World", response.text
     ssh.close
   end
+
+  should "be able to handle a large number of non-Hydra console output" do
+    ssh = Hydra::SSH.new(
+      'localhost', # connect to this machine
+      File.expand_path(File.join(File.dirname(__FILE__))), # move to the test directory
+      "ruby fixtures/many_outputs_to_console.rb"
+    )
+    response = ssh.gets
+    assert_equal "My message", response.text
+    ssh.close
+  end
 end