How to Install OS-Level Dependencies

BigchainDB Server has some OS-level dependencies that must be installed.

On Ubuntu 14.04 and 16.04, we found that the following was enough:

sudo apt-get update
sudo apt-get install g++ python3-dev libffi-dev

On Fedora 23 and 24, we found that the following was enough:

sudo dnf update
sudo dnf install gcc-c++ redhat-rpm-config python3-devel libffi-devel

(If you're using a version of Fedora before version 22, you may have to use yum instead of dnf.)