Merge pull request #14 from GregMefford/rel_0_4_0

Prep for 0.4.0 release

Author: GregMefford

README.md

@@ -15,7 +15,7 @@ Add it to your list of dependencies in `mix.exs`:
 
     ```elixir
     def deps do
-      [{:nerves_neopixel, "~> 0.3.2"}]
+      [{:nerves_neopixel, "~> 0.4"}]
     end
     ```
 

mix.exs

@@ -3,7 +3,7 @@ defmodule Nerves.Neopixel.Mixfile do
 
   def project do
    [app: :nerves_neopixel,
-    version: "0.3.2",
+    version: "0.4.0",
     description: "Drive WS2812B \"NeoPixel\" RGB LED strips from a Raspberry Pi using Elixir.",
     elixir: "~> 1.3",
     make_clean: ["clean"],