VLanvin

Hide exercises by default

5

Currently, when new exercises are added to the server, they are immediately considered as "open" and are available to the students. It would be nicer if they were hidden by...

Remaining work on branch dev

6

Just a self-reminder of the work that still needs to be done on `dev` before merging it with `master`. - [x] Implement music - [x] Add text events on Windows...

Update and uniformise lists specs

3

Uniformise specs to adhere to the proposed [EEP 71](https://github.com/erlang/eep/pull/63). Many specs use `when` constraints and `::` inconsistenly, making it hard for type-checkers to reason about. For example, ``` -spec reverse(List1)...