Updated developer doc with new process/requirements.
Updated developer doc with new process/requirements.

liujunhua/Autofac,onovotny/Autofac,zmaruo/Autofac,laizhan/autofac,laizhan/autofac,laizhan/autofac,lijianguang/Autofac,liujunhua/Autofac,autofac/Autofac,onovotny/Autofac,laizhan/autofac,jango2015/Autofac,zjmpds/Autofac