Group include directives, sort within group:
* In headers of GIL core and extensions:
1. boost/gil/extension/*
2. boost/gil/*
3. boost/*
4. C++ standard library headers
* In programs:
1. boost/gil/*
2. boost/*
3. C++ standard library headers
4. "xxx.hpp" for local headers
Add basic guidelines to CONTRIBUTING.md.
Add/Remove #include <boost/config.hpp> or std headers un/necessary.
Rename gil_concept.hpp to concepts.hpp.
Remove gil_all.hpp - we already have all-in-one boost/gil.hpp.
Tidy up and unify copyright and license header.
Tidy up formatting and excessive whitespaces in some comments.
Remove Doxygen block with file description, author, date, etc.
Remove dead or commented pragmas and directives.
Trim trailing whitespaces.
Import the selection of integer types into boost::gil namespace,
and move from channel.hpp to typedefs.hpp for easier access.
Replace bits32f with float32_t and bits64f with float64_t
- kept as alias of scoped_channel_value.
Move float64_t (bits64f) to typedefs.hpp.
Replace the four {float|double}_{zero|one} min/max channel values
with float_point_zero and float_point_one templates.
Replace <boost/cstdint,hpp> with C++11 <cstdint>.
Introduce preference of using declaration instead of typedef.
Reformat typedefs.hpp to take advantage of the using declaration
- works much better for left-to-right reading, alias name as
most important detail comes first.
Add some of missing #include typedefs.hpp, sort some headers.
