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

tasks/jasmine_dev/version.rb

@@ -0,0 +1,54 @@
+class JasmineDev < Thor
+
+  desc "write_version_files", "Write out version files"
+  def write_version_files
+    say JasmineDev.spacer
+
+    say "Building version files", :cyan
+
+    scope = OpenStruct.new(:major => version_object["major"],
+                           :minor => version_object["minor"],
+                           :build => version_object["build"],
+                           :release_candidate => version_object["release_candidate"],
+                           :revision => Time.now.to_i)
+
+    js_template = Tilt.new(File.join(JasmineDev.project_root, 'src', 'templates', 'version.js.erb'))
+    create_file File.join(JasmineDev.project_root, 'src', 'version.js'), :force => true do
+      js_template.render(scope)
+    end
+  end
+
+  desc "display_version", "Display version currently stored in source"
+  def display_version
+
+    say "Current version information from src/version.json", :cyan
+
+    say "Display version: "
+    say "#{version_string}", :yellow
+
+    say "Version object: "
+    say "#{version_object_old}", :yellow
+  end
+
+  no_tasks do
+    def version
+      @version ||= File.read(File.join(JasmineDev.project_root, 'src', 'version.json'))
+    end
+
+    def version_string
+      display = "#{version_object['major']}.#{version_object['minor']}.#{version_object['build']}"
+      display += ".rc#{version_object['release_candidate']}" if version_object['release_candidate']
+      display
+    end
+
+    def version_object
+      @version_object ||= JSON.parse(version)
+    end
+
+    def version_object_old
+      version.gsub("\n", " ").
+        gsub(/\s+/, " ").
+        gsub(/\}\s+$/, "}")
+    end
+  end
+end