Supports to the playbook of Process Substitution

It was an error to specify the playbook of [bash process substitution](http://tldp.org/LDP/abs/html/process-sub.html) as follows.

```
$ ansible-playbook -i stage <(curl -s https://raw.github.com/masahide/playbook-sample/master/sample.yml)
ERROR: the playbook: / dev/fd/63 does not appear to be a file
```
If using the bash process substitution, this error seems to occur to become a named pipe file.