Friendly errors for score challenge
Re-export package
Merge pull request #59 from ArbiterGames/FriendlierTournamentErrors

Friendlier score challenge errors
Fix handler naming typo
Merge branch 'master' of github.com:ArbiterGames/Unity-SDK
Merge branch 'refs/heads/master' into AddMixpanel

Conflicts:
	UnityExample/Assets/Editor/Arbiter/Mixpanel/Media.xcassets.meta