Add Museum Victoria as data source

## Problem
Museum Victoria ([API documentation](https://collections.museumsvictoria.com.au/developers)): Museums Victoria is Australia’s largest public museum organisation, and the principal custodian of the State’s scientific, cultural and heritage collections. Its API provides access to meta data on licenses, use rights and open access. We can also get information on article type, image license, display location, locality, museum location, etc. There are 150,000 objects available.

## API information
- No API key required
- No query limit
- At the moment it only supports the GET verb and responses are in JSON only.

## License information ([Reference](https://museumsvictoria.com.au/legals/))
All of the text published on the site is licensed using a Creative Commons Attribution 4.0 International license. But the license for images, sounds and audio-visual material are distributed across different licenses.

## Interesting questions to ask:
- The percentage of CC license are being used
- The distribution of license type for images and audios
- What proportion of images, audios fall under public domain?