Add stream handler
feature #22 Add stream handler (jeremy-derusse)

This PR was merged into the master branch.

Discussion
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Add stream handler

This command allow the user to run a streamed script
Sample of use:

```bash
$ melody run phar:///opt/resource.phar/test.php
$ melody run https://gist.githubusercontent.com/lyrixx/565752f13499a3fa17d9/raw/f561159b09a2014dd0d75727582c2cf8ee36e30e/melody.php
$ melody run php://stdin < test.php
```

Commits
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e7ff0d3 Add stream handler