Update the description of this module to include D7

As a D7 noob, I came across this page while trying to figure out how to do number formatting on a field in D7--it would be nice if it were mentioned somewhere near the top of the description that this is all now in core and that to control formatting you just have to go to "Manage Display." Maybe I am going crazy though and everyone else already knows this and it's super obvious. In that case, just ignore this.