Print the error backtrace more readably.

Currently, the error backtrace looks like this:

```
An Error Occured: #<Errno::ETIMEDOUT: Operation timed out - connect(2)>
["/Users/webdev/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/net/http.rb:877:in `initialize'", "/Users/webdev/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/net/http.rb:877:in `open'", "/Users/webdev/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/net/http.rb:877:in `block in connect'", ...
```

Kind of unreadable.