Make pinning the width or height of one view to another work when both views are peers, or even if they have any common ancestor.
The commonAncestorForViews: method should be useful in the future as we add more interesting things to this category.
Merge branch 'develop' of https://github.com/Raizlabs/RZUtils into bugfix/mgorbach/autolayout-common-ancestor
Add exceptions.
Merge pull request #107 from Raizlabs/bugfix/mgorbach/autolayout-common-ancestor

Bugfix/mgorbach/autolayout common ancestor