Add FitHeight and FitWidth + move relative positioning to bitmasks

Signed-off-by: Marc Lefrançois <mlefrancois@mirego.com>
Merge branch 'refs/heads/master' into feature/FitSizeToSuperView
increment pods minor version we are breaking the API

Signed-off-by: Marc Lefrançois <mlefrancois@mirego.com>
Merge pull request #14 from mirego/feature/FitSizeToSuperView

Feature/fit size to super view