Bump version to 2.4.1

Merge pull request #50 from demianmnave/48-cmlconstants-functions-sho…

…uld-be-constexpr

48 cmlconstants functions should be constexpr

Update msvc-17-10.yml

v2.2.1 Release

Merge develop into master for milestone 2.2.0 (#34)

* Made the CML target into a real interface library, added a convenience custom_target to see headers in an IDE, and changed to use CMake C++ feature tests

* Updated to Catch2

* Updates to account for CMake C++ feature tests and dropping support for older compilers

* Downgrade CMake requirement to 3.12.4.

* Add .gitignore

* Update to Catch2 2.13.4

* Remove older XCode builds, specify C++ standard

* Add C++ standard, clean up CMake command line

* Minor fixes to TravisCI and AppVeyor yml

* More AppVeyor yml fixes

* Fix AppVeyor yaml syntax error

* Attempting AppVeyor fix again

* AppVeyor fix attempt, again

* Enable RDP to debug CMake

* Remove extra builds temporarily

* Testing vcvars call

* Fix VCPATH

* Fix VCPATH usage

* Remove AppVeyor clang-cl build for now

* Tidy up CMakeLists.txt and AppVeyor (#32)

* Tidy up the CMake build, add an installation option, tidy up AppVeyor using the Ninja CMake generator, and fix _source_group(...)_ usage

Closes #27, #29, #30, #31

* Restore Visual Studio build functionality, and add GCC and Clang entries for testing

* Use pwsh for the test_script, fix the Visual Studio generator specifications, and set the CMAKE_BUILD_TYPE for the Ubuntu bulds

* Remove spaces from the CMake arch and toolset, as this seems to confuse CMake when called from pwsh

* Move CMAKE_BUILD_TYPE back under the Ubuntu builds, specify Clang and GCC command versions explicitly, and explicitly set the path before running ctest

* Enable concurrent builds for the Visual Studio generators, and only change to the "build" directory if not already there

* Bump version to 2.2.0

* Fix TravisCI build (remove Ubuntu), and enable AppVeyor and TravisCI on master

Co-authored-by: Demian M. Nave <dnave@propulsor.net>

Implemented writable_vector::fill() and writable_matrix::fill() conve…

…nience functions.

- Bumped CML to version 2.1.2.
- Added CMake commands to create a project folder structure containing the CML headers.  This is currently tested with Visual Studio 2013+.

Closes #16

Forgot to update version.h.