UK ScanCodeSet 2 errors

[thejpster]

On a PS/2 UK keyboard with 0.6.1:

• The #~ key produces \|
• The \| key produces #~

[thejpster]

KeyCode::HashTilde => {
    if modifiers.is_shifted() {
        DecodedKey::Unicode('~')
    } else {
        DecodedKey::Unicode('#')
    }
}

should be

// Ok a UK keyboard, this is actually left of Z and has neither Hash nor Tilde on it
KeyCode::HashTilde => {
    if modifiers.is_shifted() {
        DecodedKey::Unicode('|')
    } else {
        DecodedKey::Unicode('\\')
    }
}
// This key is between Carriage Return and @
KeyCode::BackSlash => {
    if modifiers.is_shifted() {
        DecodedKey::Unicode('~')
    } else {
        DecodedKey::Unicode('#')
    }
}