Modify the position of the camera view
Fixed the view bing enlarged by the camera output
Merge branch 'master' of https://github.com/HuaXinChen/DeviceTracker into Victor

Conflicts:
	DeviceTracker/DeviceTracker.xcodeproj/project.pbxproj
	DeviceTracker/DeviceTracker/Base.lproj/Main.storyboard
	DeviceTracker/DeviceTracker/ViewController.m