Add redirection with feed back for legacy URLs
When users try one of the following endpoints
- /<flavour>/summary/
- /<flavour>/<slot>/build/<build_id>/
- /logs/checkout/<flavour>/<slot>/<build_id>/<project>/
- /logs/build/<flavour>/<slot>/<build_id>/<platform>/<project>/
- /logs/tests/<flavour>/<slot>/<build_id>/<platform>/<project>/
they get a notification and are automatically redirected to the new location.
Closes #52 (closed)