Hello,
The easiest way to get pandora is to download it from one of the two links at the top of the following page:
http://xrubio.github.io/pandora/Once decompressed you can look at the files present in docs/tutorials. The first one (00_installing.txt) will describe how to install pandora on your computer. You can then look at the other tutorials to learn how to use pandora.
If you intend to do some developments to imporve the pandora platform, you can do a clone of the git folder from the following page:
https://github.com/xrubio/pandora