added testcases-file
changed test case for traversal to use solve instead

Erik 15 min
committed wrong files previous commit, changed to the right one
deleted files extra bullshit shit
Removed vals from sudoku.sml

Oskar
Added two puzzles to solve in test cases, and also a test for squareWithLeastUnknowns

Erik 2h
Added descriptions to the three tests

Erik 15min
Added function specification for tests and added results for each individual test

Oskar, 5 min
Removed comment
Merge pull request #2 from Oskwish/testcases

Merge testcases with master