set doc charset utf8
Update to support chinese characters

1) Mysql db:
a) vim /etc/mysql/my.cnf
 [client]
 default-character-set = utf8
 [mysqld]
 init_connect='SET collation_connection = utf8_unicode_ci'
 init_connect='SET NAMES utf8'
 character-set-server=utf8
 collation-server=utf8_unicode_ci
 skip-character-set-client-handshake

b) sudo service mysql restart

c) create db and check
 show variables like "char%"
 show create table <TABLE_NAME>

2) Update db connect option
 charset=utf-8

3) Add #encoding=utf-8 in python files

4) set sys def charset as utf-8
 reload(sys)
 sys.setdefaultencoding('utf8')

5) use json.dumps
Add solution about chinese character