Add Get method to Felica reader sample code

tagtool.py

    def show_tag(self, tag):
        # print tags
        print(tag)

        # create url values
        url_values = urllib.urlencode({"read": tag})

        # create request url
        url = "http://localhost:8000/?" + url_values
        print("    Request to: " + url)

        try:
            res = urllib2.urlopen(url)

            # output result
            if res.code == 200:
                print('        Success! msg: ' + res.msg)
            else:
                raise('        Fail! code: ' + str(res.code) + ', msg: ' + res.msg)
        except:
            print("        Unknown error: ", sys.exc_info()[0])