Merge pull request #355 from kwanggithub/master

remove unused jar commons-logging-1.1.1.jar from /lib and build.xml 

build.xml

@@ -67,7 +67,6 @@
         <include name="jython-2.5.2.jar"/>
         <include name="libthrift-0.7.0.jar"/>
         <include name="guava-13.0.1.jar" />
-        <include name="commons-logging-1.1.1.jar" />
         <include name="httpclient-4.2.2.jar" />
         <include name="httpcore-4.2.2.jar" />
         <include name="json-simple-1.1.1.jar" />