Shuffle directories and filenames to get rid of historic cruft and to better reflect contrib/production status

Radko Krkoš authored 6 years ago and Pavel Kácha committed 6 years ago

Signed-off-by: Pavel Kácha <ph@cesnet.cz>

 * Slight help for warden_curl_test.sh
 * TL;DR README section

Added optional client auth by shared secret (also modified schema, client, curl client). Modified Client __str__ method for log display without disclosing secret. Modified wsgi server logging and parameter disposing accordingly.

Clients are now authorized by client= argument in URL, schema and client lib is updated accordingly. Method authentication defined in "expose" decorator. Added Client container class for deterministic logging. Schema update to consistent InnoDB and utf8mb4 everywhere.

Error is now raised via req.error helper, which automatically adds already known info (method, request id), thus calls are terser.
Client's Error communicates request id, if received from server.
exc_info made explicit everywhere. Automatic exc_info gathering sometimes returned bogus info about unrelated exception from far before.