added workspace and workspaceFolder maintenance code since it's easier done here rather than in service layer. workspace/workspaceFolder/organisation/user may need be remodeled to make thing clearer
Tweaking to reduce the number of times the User object is retrieved from the database. Also partially implemented the cache clear when a user object is changed.
Tweaked how the preview deletion is called (now calls the web layer of monitoring not the service directly - if it calls the service then the spring context doesn't contain all the tool details.)Also changed jsps to use the lams custom tags.
