Add a proper signed certificate

[candroid-man]

It's a little ghetto to have to tell Windows that you trust the "unknown source" of the .exe file. Most people I know wouldn't even download it due to that, but I figured this is just a new open-source project. Please fix this soon!

[lulzsun]

I understand the reasoning behind wanting a signed certificate. But considering the current state of this open-source project, I don't think I can justify paying for a code signing service, unless you know of a free and reputable code signing service (which does not seem to exist).

It will for sure be considered in the future if the project gains more traction.