Update .gitignore for ./bundle, .ruby-version
Update tournament_spec for 4 players
Update DB_player files per JN
Revert "Update .gitignore for ./bundle, .ruby-version"

This reverts commit 7da356a9f543ca4b97e2d6d9f60418be8ad88629.
Update code per JN
Update test spec to remove subject=

* Also remove unused variable @throws
Remove commented out lines