Ensure that output dir is created.

lib/pith/project.rb

@@ -68,6 +68,7 @@ def build
       refresh
       load_config
       remove_old_outputs
+      output_dir.mkpath
       generate_outputs
       output_dir.touch
     end

lib/pith/version.rb

@@ -1,3 +1,3 @@
 module Pith
-  VERSION = "0.2.1".freeze
+  VERSION = "0.2.2".freeze
 end

spec/pith/project_spec.rb

@@ -5,7 +5,19 @@
 
   before do
     $input_dir.mkpath
-    @project = Pith::Project.new(:input_dir => $input_dir)
+    @project = Pith::Project.new(:input_dir => $input_dir, :output_dir => $output_dir)
+  end
+
+  describe "#build" do
+
+    before do
+      @project.build
+    end
+
+    it "creates the output directory" do
+      $output_dir.should be_directory
+    end
+
   end
 
   describe "#input" do