Merge pull request #183 from elixirkoans/boost_the_minimum_required_version_to_1.3

Use Elixir 1.3 as the new minimum bar

.travis.yml

@@ -1,8 +1,6 @@
 language: elixir
 matrix:
   include:
-    - elixir: 1.2.2
-      otp_release: 18.2.1
     - elixir: 1.3.4
       otp_release: 19.1
     - elixir: 1.4.1

mix.exs

@@ -4,7 +4,7 @@ defmodule Koans.Mixfile do
   def project do
     [app: :elixir_koans,
      version: "0.0.1",
-     elixir: ">= 1.2.1 and < 2.0.0",
+     elixir: ">= 1.3.0 and < 2.0.0",
      elixirc_paths: elixirc_path(Mix.env),
      deps: deps()]
   end