Update BoardV1.java

To make API-wide configuration matches between classes.
Merge pull request #2 from hagikuratakeshi/patch-1

Update BoardV1.java
Update pom.xml

1.8.4
Removes id_token references from JS and modifies backend to support it

Reviewed in https://codereview.appspot.com/14529047/
Switches to G+ signin to align with other tictactoe samples
Backs out scope changes from before
Move to 1.8.8 version
Delete Java sources. Adds Scala sources