adding exit() method to stop script execution
fixing https://github.com/wso2/jaggery/issues/105
Removing javax.servlet and javax.servlet.jsp jars from jaggery packs since it's no longer used. CARBON-14864
refactoring log hostobject
updating jaggery-extensions
removing webapp mgt bundles from jaggery and including the webapp mgt features created specifically for jaggery.
Merge pull request #107 from wso2-dev/master

updates from wso2-dev fork
merging https://github.com/wso2/jaggery/pull/106
Merge branch 'kasunbg-remove-javax.servlet-jars'