Merge pull request #19 from djMax/mm_directselectors

[css] support for direct descendent selectors
Merge pull request #20 from djMax/gscf_autofixed

[css autosizing] fixed auto sizing interactions of one dimension when an...
[CSS] Fix UIButton KVO deallocation warning by making NIDOM retain views registered in it.
Merge pull request #21 from djMax/omg-kvo-warning

[CSS] Fix UIButton KVO deallocation warning by making NIDOM retain views registered in it.
Account for padding when re-calculating auto width after setting the height of views. Stop (incorrectly) re-calculating auto height after setting the width of views.
Merge pull request #22 from djMax/crazy-stuff

Account for padding when re-calculating auto width after setting the height of views
Merge branch 'master' of https://github.com/djMax/nimbus into mm_ni