[IMP]Improved project and task field in add activity so that it supports autocomplete feature, used jquery.ui and jquery.ui.bootstrap for auto complete, override autocomplete proto so that it allows html inside option and allows class(same as web module, view_form.js), improved session management, added session object in localstorage to keep origin and session_id persistent once user is logged in with particular server address, improved load_server_data if user is already logged in before, removed datejs instead used momentjs, loaded task.work and add related project_id in it and stored it in localstorage.