Added removeObserver from [NSWorkspace sharedWorkspace] in -(void)invalidate to fix crash when wake up from sleep mode
Move to Xcode5.
Update to latest codebase.
Merge commit 'b0082a05b50627ef065d446ca58b4ed7637c8414' into test

original : Added removeObserver from [NSWorkspace sharedWorkspace] in -(void)invalidate to fix crash when wake up from sleep mode