default_config added inside main package and changed to initialize memory db when no config for sqlite file exists. Mail setting come from config now, default set to localhost mail server.
Changed resource_id to resource_url, some changes in manager and saga_helper API to make it less confusing and clear. I tried to make localhost to work but I get errors when I want to sftp localhost so it is disabled for now. I also added code to add new resources to db but it is also deactivated because of localhost issue. Messy commit I know :(