gndf.io client for Elixir

The package can be installed as:

1. Add egndf to your list of dependencies in mix.exs:

```elixir
def deps do
  [{:egndf, "~> 0.2.2"}]
end
```

2. Ensure egndf is started before your application:

```elixir
def application do
  [applications: [:egndf]]
end
```