[klaus]

There is a new version 1.3 in the first post.
- Added solver, not the best one yet, misses solutions for difficult puzzles
- Added background coloring
- Added background color for 1 and 2 small number cadidates
- Added saving and loading of puzzles

@dlfallen.
I haven't added the editing of small numbers. Is this necessary, becaus the small numbers can be displayed automatically.
I have translated the source code of the solver, you sent me, from VB to B4PPC. Unfortunately it is nor able to find solutions for difficult grids. I will look for an other one.

Best regards.