MongoDB support

[ccamel]

I started working on MongoDB database support in Piper. I think it's a very interesting NoSQL database for Piper due to its ability to persist very easily JSON (/BSON) documents.

I would like to know if you would be interested in this contribution?

[runabol]

Interesting. Have you considered Postgres JSON support? In fact, I kind of regret not taking advantage of it when I first designed Piper.

[ccamel]

@creactiviti Yes I have. This is the first remark I made to myself when I looked at the database schemas. I think we could easily implement it in Piper. Perhaps we can open an issue about this?

[runabol]

Absolutely