Created Challenge 5 - Guess Language

Signed-off-by: Jonathan Tomek <jonathan.tomek@gmail.com>
Updated answers to support new challenges

Signed-off-by: Jonathan Tomek <jonathan.tomek@gmail.com>
Moved old challenge 5 to beginner 1

Signed-off-by: Jonathan Tomek <jonathan.tomek@gmail.com>
Moved challenge 6 to beginner 2

Signed-off-by: Jonathan Tomek <jonathan.tomek@gmail.com>