Loosen and update deps

The only major version bump is plug, and that's primarily due to plug having its (presumably, assuming they're following semver) first real stable release.  The rest is just loosening existing deps to allow for newer minor versions.

Author: YellowApple

mix.exs

@@ -19,15 +19,15 @@ defmodule HttpRouter.Mixfile do
   end
 
   defp deps do
-    [ { :cowboy, "~> 1.0.2" },
-      { :plug, "~> 0.14.0" },
-      { :poison, "~> 1.4.0" },
-      { :xml_builder, "~> 0.0.6" },
-      { :earmark, "~> 0.1.17", only: :docs },
-      { :ex_doc, "~> 0.7.3", only: :docs },
-      { :inch_ex, "~> 0.3.3", only: :docs },
-      { :excoveralls, "~> 0.3.11", only: :test },
-      { :dialyze, "~> 0.2.0", only: :test } ]
+    [ { :cowboy, "~> 1.0" },
+      { :plug, "~> 1.0" },
+      { :poison, "~> 1.4" },
+      { :xml_builder, "~> 0.0" },
+      { :earmark, "~> 0.1", only: :docs },
+      { :ex_doc, "~> 0.7", only: :docs },
+      { :inch_ex, "~> 0.3", only: :docs },
+      { :excoveralls, "~> 0.3", only: :test },
+      { :dialyze, "~> 0.2", only: :test } ]
   end
 
   defp description do