Updates framework to support automated framework subclasses

All framework classes have been renamed to use the SihnonFramework_ prefix.
The class autoloader now looks for subclasses of the framework classes in the Sihnon_Lib directory, and
automatically creates them if they don't exist. The autoloader correctly creates interfaces and abstract
classes as needed, by using reflection to check the type of the parent class.
All references to classes within the framework now use the Sihnon_ prefix.
The PluginFactory supports multiple scan directories, and will search both the framework and subclass class
tree to find candidate plugins.

source/lib/SihnonFramework/Log/IPlugin.class.php

@@ -0,0 +1,27 @@
+<?php
+
+interface SihnonFramework_Log_IPlugin extends Sihnon_IPlugin {
+    
+    /**
+     * Returns a new instance of the Plugin class
+     * 
+     * @param array(string=>mixed) $options Configuration options for the Plugin object
+     */
+    public static function create($options);
+    
+
+    /**
+     * Records a new entry in the storage backend used by this logging plugin
+     * 
+     * @param string $level Severity of the log entry
+     * @param int $ctime Time the log entry was created
+     * @param int $pid ID of the process that created the log entry
+     * @param string $hostname Hostname of the system that created the log entry
+     * @param string $progname Name of the application that created the log entry
+     * @param int $line Line number of the code that created the log entry
+     * @param string $message Message to be logged
+     */
+    public function log($level, $ctime, $pid, $hostname, $progname, $line, $message);
+}
+
+?>