Initial commit
botones de menu principal y fondo de pantalla creado
Merge branch 'master' of https://github.com/kfilella/Buscaminas
Merge branch 'master' of https://github.com/kfilella/Buscaminas
Merge branch 'master' of https://github.com/kfilella/Buscaminas

Conflicts:
	README.md
Commit , cambios a la clase Celda.java