Fix includes relative to boost/gil/

Subject: Fix includes relative to boost/gil/
From: Mateusz Loskot (mateusz_at_[hidden])
Date: 2018-09-27 17:06:59

Hi,

I'm going to clean-up #include-s of GIL headers replacing all

#include "x.hpp"

with

#include <boost/gil/...hpp>

Before I dive head first into cooking a PR, any strong objections?

I will also sort the includes by the way:

#include <boost/gil/...>
#include <boost/...>
#include <...std...>

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net