added static index.html for explorer
added libraries
got basic create source working
improved status message and response formatting
formatted json output
added handling for empty response and loading
added list sources request
refactored
refactored more
tidied html
added more actions
styling, tidy
Merge pull request #15 from TID-Lab/1056_api_explorer

1056 api explorer
Merge branch 'develop' of github.com:TID-Lab/aggie into 1056_api_explorer_endpoints
include fetching controller in main app.