Initialize new ArrayList's with the type Monster

AFAIK you should add a Class between the <> when initializing a new List/whatever with <>
Merge pull request #20 from blackwolf12333/patch-1

Initialize new ArrayList's with the type Monster
Fixed the .gitignore file

.gitignore had remnants of past merge conflicts.
Merge pull request #21 from Bl-nK/fixGitIgnore

Fixed the .gitignore file

Thanks for the tidy.