Task #15 Custom picker

- BPPickerView: UIPickerView clone with additional features and custom
design
Task #15 Custom picker

- BPDatePicker, BPLanguagePicker, BPMenstruationPicker, BPPeriodPicker,
BPSoundPicker, BPTemperaturePicker, BPTimePicker, BPUnitPicker: simpify
delegates, fix components width and text alignment
Task #1 Tab Bar Application

- BPTabBarController: fix empty space in tabbar for iOS7