Remove xibs
Move ListFieldViewController function to MainViewController
Don't need this property
Setup Setting button show on ListFieldViewController
Merge remote-branch 'feature/changeLayout' into feature/changeLayout

Conflicts:
	hackfoldr-iOS/ListFieldView.xib
	hackfoldr-iOS/ListFieldViewController.h
	hackfoldr-iOS/ListFieldViewController.m
	hackfoldr-iOS/MainView.xib
	hackfoldr-iOS/MainViewController.m
	hackfoldr-iOS/SettingView.xib