Moved event management documentation before configuration options documentation
Moved event management documentation before configuration options documentation

acelaya/ZF2-AcMailer,acelaya/ZF-AcMailer,acelaya/ZF2-AcMailer,nomaanp/ZF2-AcMailer,nomaanp/ZF2-AcMailer,acelaya/ZF-AcMailer,samsonasik/ZF2-AcMailer,samsonasik/ZF2-AcMailer