Added Naked Quad technique

Signed-off-by: Daniel <Dahlkvist>
refactor candidates

Signed-off-by: Daniel <Dahlkvist>
refactgoring

Signed-off-by: Daniel <Dahlkvist>
- added technique for hidden triples/quads
- fixed bug with hidden techniques
- added solution for naked triples/quads

Signed-off-by: Daniel <Dahlkvist>