Changed gen.sh

git-svn-id: https://svn.wso2.org/repos/wso2/trunk/commons@168169 a5903396-d722-0410-b921-86c7d4935375
Added readme



git-svn-id: https://svn.wso2.org/repos/wso2/trunk/commons@168170 a5903396-d722-0410-b921-86c7d4935375