rubyzip/rubyzip — pull request #134 by srawlins (2014-02-06 23:02:15+00:00)
Title: File.exists? -> File.exist?

According to ruby 2.1, when running the tests:

```
/Users/srawlins/code/rubyzip/test/gentestfiles.rb:53: warning: File.exists? is a deprecated name, use File.exist? instead
```

This pull request does that.