v1.2: Merge pull request #19 from fcanas/autolayout

• Convert xib to AutoLayout
• Use nested stack views
• Respect safe areas
• Updates required iOS version to 9 due to stack views and xib safe area features

v1.1.3

FCColorPickerViewController's delegate property is now weak to prevent a case where the picker might message a released object. Such calls will now go safely to nil instead of crashing.