fpillet/NSLogger — pull request #136 by mcgraw (2014-04-05 15:37:47+00:00)
Title: Error hit saying not to import once.h directly 

Using iOS 7.1. When you import once.h this is hit --

#ifndef __DISPATCH_INDIRECT__
#error "Please #include instead of this file directly."
#include // for HeaderDoc
#endif

dispatch.h defines __DISPATCH_INDIRECT__