code: function compileAndRender(templatePath, content, callback) {
  		if (templatePath in templates) {
  			return callback(null, templates[templatePath].render(content));
  		}
  		fs.readFile(templatePath, 'utf8', function(err, template) {
  			if (err) {
  				return callback(err)
  			}
  			templates[templatePath] = hogan.compile(template);
  			callback(null, templates[templatePath].render(content));
  		})
  	}
docs: Render a given template with appropriate content. Use cached pre-compiled template if possible, and populate cache for new templates.  @param templatePath [String] path to rendered template, used as key in cache @param content [Object] object used to be rendered inside the template @param callback [Function] end processing callback, invoked with arguments: @option callback err [Error] an error object, or null if no error occured @option callback html [String] Html rendering for this template