Updated to version 4.1.0 and added a new class for installing language packs

The current stable version is 4.1.0, so I bumped the Version up.
Also there was no ability to install additional language packs, so I added a new class ``libreoffice::languagepack``

Usage of the languagepack class: 

```puppet
include libreoffice::languagepack
```

which includes the default language (German), or get your own laguage as follows:

```puppet
class { 'libreoffice::languagepack':
  locale => 'fr',
}
```