missed a s on match_unique_decks association
updated .gitignore
removed airbrake for honeybadger
fixes https://www.honeybadger.io/inspector/p/35534/5961655
Merge pull request #255 from gerard-leijdekkers/constructed_fix

fixes https://www.honeybadger.io/inspector/p/35534/5961655
Check for blank @my_decks