Changes for Packagist
Adding to contributors file

Also testing whether service hook works for Packagist
Removing manual version definition
Add the ability to save data to a stream.

- Useful when we don't want to save to a filename directly but stream
  it (this was something available in php-cloudfiles as well).
Merge branch 'add-save-to-stream-to-objectstorage' of github.com:chmouel/php-opencloud into add-save-to-stream-to-objectstorage