#16
#13

fix interface builder render problem

edit the delegate, send LabelSwitch instead of State

• Refactor the LabelSwitch file
• Add gradient background support
• Add image background support
• Name "LabelSwitchSetting" -> "LabelSwitchConfig"

CircleView's shadow and color is editable now
Add fullSizeTapEnable, can trigger the switch while tap on the whole switch

Add change currentState through code