Merge pull request #253 from jum/tintColor

Only refer to tintColor on iOS7 and up.
Support Dynamic Text
Project update, minimum iOS version increased to 6.0
Added IASKSubtitle to settings scheme options
iOS 8+ Privacy link
Fixed cell reloading issue

don't reload tableViewCell if userDefaults change was induced by IASK itself
Fixed flickering issue when using -setHiddenKeys:animated:
Display chevron in OpenURL cells
Use tintColor for button text color

if not left-aligned
Make important properties IBInspectable
Added Podspec