Added basic logging class for a fallback

Corrected unit tests for new code

Add partial unit coverage for logging class

Add newline to logTest file

test/Resque/Tests/JobTest.php

@@ -17,6 +17,7 @@ class Resque_Tests_JobTest extends Resque_Tests_TestCase
 
 		// Register a worker to test with
 		$this->worker = new Resque_Worker('jobs');
+		$this->worker->setLogger(new Resque_Log());
 		$this->worker->registerWorker();
 	}