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Links:
- http://www.andrew-seaford.co.uk/check-dotnet-framework-installed-inno-setup/
- https://innosetupnet.codeplex.com/
- https://gist.github.com/canton7/72104b1fb154442d5a9ba937fd3ee781 : install .net 4.6.1 if needed
- http://stackoverflow.com/questions/4104011/inno-setup-verify-that-net-4-0-is-installed
- https://blogs.msdn.microsoft.com/davidrickard/2015/07/17/installing-net-framework-4-5-automatically-with-inno-setup/