Provide a strong-named assembly for tagged releases

[jevakallio]

It would be incredibly helpful if you could provide a strong name signed build of the tagged releases going forward. The project already includes a .snk file, but it requires the user to be able to build to binaries from source.

Since CefSharp aims to provide a CEF implementation for managed assembly, and most of its consumers are programming in purely managed languages (C#), it's reasonable to expect that some users don't have a Visual Studio edition which is capable of building mixed managed/native projects. This is the case for me as well, and I currently need to ask a friend to build it for me.

Thanks @ataranto and other maintainers for all the awesome work on this project! It's been a real boon, and a pleasure to use.

[ataranto]

agree, i will try to do this for future releases