change mysql default character set to UTF8 in my.cnf

http://stackoverflow.com/questions/3513773/change-mysql-default-character-set-to-utf8-in-my-cnf

[mysqld]
init_connect='SET collation_connection = utf8_unicode_ci'
init_connect='SET NAMES utf8'
character-set-server = utf8
collation-server = utf8_unicode_ci

[client]
default-character-set = utf8