setting rasterization scale on MTStackContentContainerView
Merge pull request #16 from rex-remind101/master

[rex-remind101/MTStackViewController] Vocab fix.
Merge pull request #11 from sapheriel/master

MTStackContentContainerView is missing proper rasterization scale
Update stack view to use edge gesture recognizers.
Merge iOS7 changes to allow use of screen edge gesture recognizer for left swipe.