def project_templates
      response = self.class.get '/project_templates.json'
      handle_response(response, Proc.new {|h| Logan::ProjectTemplate.new(h) })
    end
def project_templates
      response = self.class.get '/project_templates.json'
      handle_response(response, Proc.new {|h| Logan::ProjectTemplate.new(h) })
    end
get project templates from Basecamp API

 @return [Array<Logan::ProjectTemplate>] array of {Logan::ProjectTemplate} instances