Re-implemented all development Rake tasks in Thor. Now actually tested.

Fixes:
* https://www.pivotaltracker.com/story/show/25484287 & https://github.com/pivotal/jasmine/issues/183
* https://www.pivotaltracker.com/story/show/25485401 & https://github.com/pivotal/jasmine/issues/189
* https://www.pivotaltracker.com/story/show/25485953 & https://github.com/pivotal/jasmine/issues/159

spec/tasks/release_spec.rb

@@ -0,0 +1,39 @@
+require 'spec_helper.rb'
+
+describe "Release task" do
+
+  let(:jasmine_dev) { JasmineDev.new }
+
+  describe "when the pages submodule is not present" do
+    before do
+      jasmine_dev.should_receive(:has_pages_submodule?).and_return(false)
+
+      @output = capture_output { jasmine_dev.release_prep }
+    end
+
+    it "should tell the user the task is running" do
+      @output.should match(/Building Release/)
+    end
+
+    it "should prompt the user to install the submodule" do
+      @output.should match(/Submodule for Github Pages isn't present/)
+    end
+  end
+
+  describe "when the pages submodule is present" do
+    before do
+      JasmineDev.any_instance.should_receive(:write_version_files)
+      JasmineDev.any_instance.should_receive(:build_distribution)
+      JasmineDev.any_instance.should_receive(:build_standalone_distribution)
+      JasmineDev.any_instance.should_receive(:build_github_pages)
+
+      jasmine_dev.should_receive(:has_pages_submodule?).and_return(true)
+
+      @output = capture_output { jasmine_dev.release_prep }
+    end
+
+    it "should tell the user the task is running" do
+      @output.should match(/Building Release/)
+    end
+  end
+end