Able to relayout based on original size specification.
Setting size, margin, padding, or anything with layout params now triggers another layout.
Merge branch 'retainSizeSpec' of github.com:metsfan/AutoLayout-2.0

Conflicts:
	AutoLayout 2.0/AutoLayout 2.0/AL2RelativeLayoutView.m
	AutoLayout 2.0/AutoLayout 2.0/AL2ViewController.m