Luajit nuget package feature

Закрыто xottab-duty запросил слияние luajit-nuget-package-feature в xd_dev

Created by: collectioner

In this PR:

  1. Removed LuaJIT-repository dependency.
  2. Updated engine in order to use openxray.luajit nuget-package: https://www.nuget.org/packages/openxray.luajit/