Improved the solving algorithm somewhat.
It now make a list of possible values for each cell, and only checks through these
This may improve solvingtime for some board significantly, and not at all for others.
Further improvements should be researched
Improved Solving algorithm
Faster feedback in some cases were no solotion exists
Added some funtionality
Gonna rewrite Most of solving
Rewrote solving
Made it easier to make edits to the solving funtion
Added crosschecking