Add gitignore from https://github.com/github/gitignore/raw/master/Ruby.gitignore
Add gitignore from https://github.com/github/gitignore/raw/master/Ruby.gitignore

ornicar/git-pulls,mattn/git-pulls,meelapshah/git-review,schacon/git-pulls,b4mboo/git-review,meelapshah/git-review