changed the way appenders are loaded, so that they don't need to include log4js as a direct dependency

lib/appenders/dateFile.js

@@ -1,6 +1,5 @@
 "use strict";
 var streams = require('streamroller')
-, layouts = require('../layouts')
 , path = require('path')
 , os = require('os')
 , eol = os.EOL || '\n'
@@ -13,42 +12,42 @@ process.on('exit', function() {
   });
 });
 
-/**
- * File appender that rolls files according to a date pattern.
- * @filename base filename.
- * @pattern the format that will be added to the end of filename when rolling,
- *          also used to check when to roll files - defaults to '.yyyy-MM-dd'
- * @layout layout function for log messages - defaults to basicLayout
- */
-function appender(filename, pattern, alwaysIncludePattern, layout) {
-  layout = layout || layouts.basicLayout;
+module.exports = function(layouts, levels) {
+  /**
+   * File appender that rolls files according to a date pattern.
+   * @filename base filename.
+   * @pattern the format that will be added to the end of filename when rolling,
+   *          also used to check when to roll files - defaults to '.yyyy-MM-dd'
+   * @layout layout function for log messages - defaults to basicLayout
+   */
+  function appender(filename, pattern, alwaysIncludePattern, layout) {
+    layout = layout || layouts.basicLayout;
+    
+    var logFile = new streams.DateRollingFileStream(
+      filename, 
+      pattern, 
+      { alwaysIncludePattern: alwaysIncludePattern }
+    );
+    openFiles.push(logFile);
+    
+    return function(logEvent) {
+      logFile.write(layout(logEvent) + eol, "utf8");
+    };
 
-  var logFile = new streams.DateRollingFileStream(
-    filename, 
-    pattern, 
-    { alwaysIncludePattern: alwaysIncludePattern }
-  );
-  openFiles.push(logFile);
+  }
+
+  return function configure(config) {
+    var layout;
   
-  return function(logEvent) {
-    logFile.write(layout(logEvent) + eol, "utf8");
+    if (config.layout) {
+      layout = layouts.layout(config.layout.type, config.layout);
+    }
+  
+    if (!config.alwaysIncludePattern) {
+      config.alwaysIncludePattern = false;
+    }
+  
+    return appender(config.filename, config.pattern, config.alwaysIncludePattern, layout);
   };
 
-}
-
-function configure(config, options) {
-  var layout;
-  
-  if (config.layout) {
-    layout = layouts.layout(config.layout.type, config.layout);
-  }
-  
-  if (!config.alwaysIncludePattern) {
-    config.alwaysIncludePattern = false;
-  }
-  
-  return appender(config.filename, config.pattern, config.alwaysIncludePattern, layout);
-}
-
-exports.appender = appender;
-exports.configure = configure;
+};