Generate proper tokens for fipes and files ids.
Update the rebar binary.

This is temporary, the binary will be dumped in a near future.
Use the last version of Cowboy.
Serve directly index.html from the root.
Introduce a file record.
Merge branch 'refacto/file-record' into develop
Implements a simple test to offer then download a file.
README: update a Makefiles command.
Move the tests to QUnit.
(Re)Implements a simple test to offer then download a file.
README: update the nginx config for the js tests.
Tests: refactoring.
Tests: offer multiple files at once.
Tests: someone else offers a few files then leaves.
Tests: move factories to a dedicated file.
Merge branch 'feature/tests' into develop
Remove rebar
README: update requirements
App: simplify the router urls
Merge branch 'refacto/router' into develop