Some clarification of install and config procedures
Some clarification of install and config procedures

Also grammar fix

Change-Id: I6a18032fdcfa8d2536d5dedc9e32e0d36189ea57

sileht/gnocchi,gnocchixyz/gnocchi,gnocchixyz/gnocchi,leandroreox/gnocchi,sileht/gnocchi,leandroreox/gnocchi