Added doc about mm.executeModule.
Added doc about mm.executeModule.

zhangfangyan/devide,nagyistoce/devide,fvpolpeta/devide,fvpolpeta/devide,ivoflipse/devide,chrisidefix/devide,chrisidefix/devide,nagyistoce/devide,ivoflipse/devide,zhangfangyan/devide