init steam api lib

steam_api/test/steam_api_test.exs

@@ -0,0 +1,8 @@
+defmodule SteamApiTest do
+  use ExUnit.Case
+  doctest SteamApi
+
+  test "greets the world" do
+    assert SteamApi.hello() == :world
+  end
+end

steam_api/test/test_helper.exs

@@ -0,0 +1 @@
+ExUnit.start()