Revert "Merge branch 'master' of https://github.com/zhengmingc/TouchTracker"

This reverts commit 85a2c91d22898c610ae1280cd84649057cd5cb1c, reversing
changes made to b214451a1e009baf677d71695b0d1ad4aa7b7f62.
Merge branch 'master' of https://github.com/zhengmingc/TouchTracker

Conflicts:
	BNRDrawView.m
	BNRDrawViewController.h
	BNRDrawViewController.m
	TouchTracker.xcodeproj/project.pbxproj

TouchTracker.xcodeproj/project.xcworkspace/xcuserdata/wenwen.xcuserdatad
/UserInterfaceState.xcuserstate