Add gnome-builder build instructions in build guide.
@kaiw , Meld supports the gnome-builder tool and it works really smooth after your solution to this :- #274 (closed)
So I guess it's a really good way to redirect new developers toward using gnome-builder as it's now the upcoming standard for building gnome projects and is also hassle free.
This should be some 1-2 lines of addition in project's README.md