lib: introduces ini config file reader/writter

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>
Merge: lib: introduces ini config file reader/writter

To handle ini files.

Pull-Request: #566
Reviewed-by: Jean Privat <jean@pryen.org>
Reviewed-by: Frédéric Vachon <fredvac@gmail.com>
Reviewed-by: Lucas Bajolet <r4pass@hotmail.com>