Fix for gcc 13

This release fixes a problem when compiling with gcc 13 (see #17). PR #18

C++11 support

Now requires c++11 also includes the "nullptr" define fix (Issue #13)
In addition unnecessary dependency to Boost has been removed (PR #15)

Cmake CPU flags discovery and fixes for Clang

v1.0.5

Updated readme

Fixed missing export.h

Fixed missing export.h in CMakeLists.txt. Consequently export.h was not installed and compilation with version v1.0.3 of cm256cc was failing.

Fixes for MSVC build

Added a dll export directive.

Fixes for OpenSUSE build

Fixes done by Martin Hauke in cmake and pkgconfig files for OpenSUSE package build.

Fix alignment issue

Missing alignment directive in gf256.h was causing some trouble with code compiled with clang-cl. It makes sense to align this data on 16 bit boundary and the corresponding define was there (although buggy) but unused. Fixed the directive for gcc and added the define.

Start releasing

Start releasing

Use version number and revision checkpoints to help tracking changes.
The recent changes are:

• Amend cmake files to use GNU install dir and pkgconfig
• Fixed compilation warnings
• Use versioning in cmake