Added information needed for publication on hex.pm

mix.exs

@@ -1,13 +1,19 @@
 defmodule MembraneCapsRtp.MixProject do
   use Mix.Project
 
+  @version "0.1.0"
+  @github_url "https://github.com/membraneframework/membrane-caps-rtp"
+
   def project do
     [
       app: :membrane_caps_rtp,
-      version: "0.1.0",
       elixir: "~> 1.7",
+      deps: deps(),
+      description: "Membrane Multimedia Framework (RTP format definition)",
+      docs: docs(),
+      package: package(),
       start_permanent: Mix.env() == :prod,
-      deps: deps()
+      version: @version
     ]
   end
 
@@ -17,10 +23,29 @@ defmodule MembraneCapsRtp.MixProject do
     ]
   end
 
+  defp docs do
+    [
+      main: "readme",
+      extras: ["README.md"],
+      source_ref: "v#{@version}"
+    ]
+  end
+
   defp deps do
     [
       {:dialyxir, "~> 1.0.0-rc.4", only: [:dev], runtime: false},
       {:ex_doc, "~> 0.19", only: :dev, runtime: false}
     ]
   end
+
+  defp package do
+    [
+      maintainers: ["Membrane Team"],
+      licenses: ["Apache 2.0"],
+      links: %{
+        "GitHub" => @github_url,
+        "Membrane Framework Homepage" => "https://membraneframework.org"
+      }
+    ]
+  end
 end