Added project for the country austria

[jimmylevell]

:wave: I did some awesome work for the Pelias project and would love for everyone to have a look at it and provide feedback.
For a project within Austria we are planning to set up our own pelisa server. The service will be running in a docker image.
Therefore this existing project needed to be extended to only download the regional data important for Austria.

Just let me know if I have to add anything more to fulfill your requirements.

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Here's the reason for this change :rocket:

I have extended the project for the country Austria.
This enables people to build pelias only for Austria which lowers the computational requirements for hosting their own instance of pelisa.

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Here's what actually got changed :clap:

• changed the pelias.jsonto download the opendata required for Austria
• provided example test link

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Here's how others can test the changes :eyes:

• pull the project and execute the Austrian definition
• execute example URL

[missinglink]

Thanks!