Embedded databases

[fwbrasil]

I've been working on NDBC and decided to test these libraries that can download and start databases automatically:

https://github.com/yandex-qatools/postgresql-embedded https://github.com/wix/wix-embedded-mysql https://github.com/nosan/embedded-cassandra

I've integrated NDBC with the postgres and mysql libraries and they seem to work well. We should probably do the same and provide an easy way for users to start the DBs based on Quill's configuration

@getquill/maintainers

[gabfssilva]

Would it be for testing purposes?

[fwbrasil]

@gabfssilva I think so, but who knows how people would use this feature :)

[juliano]

@fwbrasil @gabfssilva what you think about a module quill-db-embedded?