Issue #644 Modules for logging

Added logback classic modules

jetty-util/src/main/config/modules/jetty-logback.mod

@@ -0,0 +1,7 @@
+[description]
+Provides a Jetty Logging implementation that logs to logback.  
+Uses the slf4j API as an intermediary
+
+[depend]
+jetty-slf4j
+slf4j-logback

jetty-util/src/main/config/modules/logback-core.mod

@@ -0,0 +1,33 @@
+[description]
+Provides the logback core implementation, used by slf4j-logback
+and logback-access
+
+[files]
+maven://ch.qos.logback/logback-core/${logback.version}|lib/logback/logback-core-${logback.version}.jar
+
+[lib]
+lib/logback/logback-core-${logback.version}.jar
+
+[license]
+Logback: the reliable, generic, fast and flexible logging framework.
+Copyright (C) 1999-2012, QOS.ch. All rights reserved. 
+
+This program and the accompanying materials are dual-licensed under
+either:
+
+    the terms of the Eclipse Public License v1.0 
+    as published by the Eclipse Foundation: 
+    http://www.eclipse.org/legal/epl-v10.html
+ 
+or (per the licensee's choosing) under
+    
+    the terms of the GNU Lesser General Public License version 2.1
+    as published by the Free Software Foundation: 
+    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
+
+[ini]
+logback.version=1.1.7
+
+[ini-template]
+## After changing versions, run 'java -jar $JETTY_HOME/start.jar --create-files' 
+#logback.version=1.1.7

jetty-util/src/main/config/modules/logback/logback.xml

@@ -0,0 +1,11 @@
+<configuration>
+  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+    </encoder>
+  </appender>
+
+  <root level="info">
+    <appender-ref ref="STDOUT" />
+  </root>
+</configuration>

jetty-util/src/main/config/modules/slf4j-logback.mod

@@ -0,0 +1,18 @@
+[description]
+Provides a SLF4J implementation that logs to Logback classic   
+To receive jetty logs enable the jetty-slf4j module.
+
+[depend]
+slf4j-api
+logback-core
+resources
+
+[provide]
+slf4j-impl
+
+[files]
+basehome:modules/logback/logback.xml|resources/logback.xml
+maven://ch.qos.logback/logback-classic/${logback.version}|lib/logback/logback-classic-${logback.version}.jar
+
+[lib]
+lib/logback/logback-classic-${logback.version}.jar