Discontinue support of Blender 2.79b on Windows.

[Hoikas]

Blender 2.79b was the last version released by BF from the 2.7x series. However, between the release of 2.79 and 2.80, many bugfixes and improvements were made in the Blender 2.7x series. Further, the Blender 2.79b for Windows release bundles the now EOL Python 3.5. Worse still, Blender 2.79b was built using Visual Studio 2013, which greatly limits the ability of libHSPlasma to adopt C++11 features, let alone those from C++14 and C++17.

With that in mind, I propose that we move to distributing our own releases of Blender with Korman. This Blender release would be built from the last HEAD of BF's Blender 2.7x branch. As it stands, this brings us forward to Python 3.7 (still in security support phase for the next year) and allows us to build with Visual Studio 2015 (and above). The Korman installer would include both Blender and Korman.

This upgrade would be phased in with Korman 0.12 by releasing both the new Blender builds and an installer for Blender 2.79b. The Blender 2.79b installer would explicitly be noted as deprecated with this release. Once Korman 0.12 is released, the repository will immediately institute a policy of dropping support for Python 3.5. and Korman 0.13 will only be released for the new Blender builds. To facilitate issue triage and porting, Korman 0.10 and Korman 0.11a will be re-released with the new Blender builds alongside Korman 0.12.

Nothing in this issue should be construed to affect non-Windows platforms, including, but not limited to, Linux and macOS.

[Hoikas]

Blender for Korman has been working well for quite a few releases at this stage. Therefore, this is complete.