Add global fetching endpoints.
Keep track of global fetching status, add endpoint.
Add endpoint to delete all sources.
Add basic report controller.
Merge branch 'develop' of github.com:TID-Lab/aggie into 1056_api_explorer_endpoints
include fetching controller in main app.
Change Explorer endpoint path for deleting all sources.
Fix return response for empty source list.
Bot master should load all sources when instantiated for the first time.
Load all sources immediately when initializing BotMaster.
Merge branch '1056_api_explorer_endpoints' into develop