Extracted FetchTask and LoadSiteManagerTasks into own files
new feature: Add site (does not support db yet)
<pre> does no longer wrap
Extracted sites.yaml from config.yaml

sites.yaml will be overwritten when changing sites
Added test resources for backups
Implemented backup feature (backend)
Site upgrade back ups first, and rolls back on error
Enabled list backup and create backup for the web UI
Changed yellow to orange in web console