Added Malware Bazaar downloader and Capa result generation

[accidentalrebel]

Hello!

I saw your video about your blue-jupyter notebook and in it you mentioned that you planned on adding a downloader from Malware Bazaar.

I decided to add this feature and also added a way to plug the samples to capa to generate results.

Feel free to merge this if it's useful for you. If not, it's okay, because I understand that each analyst has a different way of going doing things.