update slider for work with java9
Merge pull request #17 from andy1138/java9

update slider for work with java9
Merge pull request #20 from jacobsallan/swingtut

closing issue #3 for tutorials that currently work. (see issue for
comments/chat)

As discussed in issue #3 all tutorial examples that currently don't
have a scala-swing api will be submitted via its own pull request.