[DOC] Editorial changes in Documentation Guide

End to end view moved to Setting up from Introduction. Steps numbered in Setting up and Setting up project repositories title fixed.

Issue-ID: DOC-623
Issue-ID: DOC-624

Change-Id: I36fa54c2a86e98f220a80391b91bd1408890a61a
Signed-off-by: Andrea Visnyei <andrea.visnyei@nokia.com>
2 files changed