- support url extension for specifying required response format
- update scriptUrl method to handle various forms of specifying format on url
- refactor web script request hierarchy; remove copy & paste
- add reset web script registry to web script "Test Server"
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5803 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261