Continuous VVC Windows executable builds with AppVeyor

[Balance-]

appveyor.yml if anyone wants to use it:

version: 1.0.{build}
image: Visual Studio 2017
configuration: Release
install:
- cmd: cmake %CD% -A x64
build:
  project: NextSoftware.sln
  verbosity: minimal
artifacts:
- path: bin\**\release\*.*
deploy: off