[doc] update read me
[doc] update read me

rryqszq4/ngx_php,rryqszq4/ngx_php,stuartjing/ngx_php,stuartjing/ngx_php,rryqszq4/ngx_php,stuartjing/ngx_php,stuartjing/ngx_php,rryqszq4/ngx_php,rryqszq4/ngx_php,rryqszq4/ngx_php,rryqszq4/ngxphp