Imports
- github.com/gorilla/mux
- github.com/gorilla/schema
- github.com/justinas/alice
- github.com/riston/slack-server/datastore
- github.com/slack-games/slack-client
- github.com/slack-games/slack-hangman/commands
- github.com/slack-games/slack-tictactoe/commands
- golang.org/x/oauth2
- golang.org/x/oauth2/slack
- gopkg.in/go-playground/validator.v8