Revert "Added preservesSuperviewLayoutMargins property."

This reverts commit 48e3962d657ad0369c84b10ba77b7668b2aa558f.
Revert "Merge pull request #75 from fprosper/master"

This reverts commit 6e4e7ada244d16bdb57997116e283822d9c02b35, reversing
changes made to cd8da215fd61269c00e2affb261e789d150a8782.
Version 0.9.2.

Updated podspec.
Updated README.