リファクタリング
Merge branch 'master' of https://github.com/tomoyuki-shibayama/Sudoku into box2d
数字選択時に同じ行に色をつける
Merge branch 'master' into box2d

Conflicts:
	.target/.gitignore
	.target/views/sudoku/form.scala.html
完成画面を修正