Added instructions to manual installation for alertplugins and updated service startup instructions.
Added instructions to manual installation for alertplugins and updated service startup instructions.

gdestuynder/MozDef,mpurzynski/MozDef,mozilla/MozDef,gdestuynder/MozDef,netantho/MozDef,jeffbryner/MozDef,netantho/MozDef,gdestuynder/MozDef,Phrozyn/MozDef,gdestuynder/MozDef,mpurzynski/MozDef,mozilla/MozDef,ameihm0912/MozDef,Phrozyn/MozDef,jeffbryner/MozDef,mpurzynski/MozDef,netantho/MozDef,ameihm0912/MozDef,Phrozyn/MozDef,jeffbryner/MozDef,ameihm0912/MozDef,jeffbryner/MozDef,mozilla/MozDef,ameihm0912/MozDef,netantho/MozDef,Phrozyn/MozDef,mozilla/MozDef,mpurzynski/MozDef