Provide strong name signed versions of WkHtmlToXSharp.Win32.dll / WkHtmlToXSharp.Win64.dll

[shytikov]

Hi,

There is one small inconsistency that not allowing WkHtmlToXSharp libraries be used in signed assemblies — WkHtmlToXSharp.Win32.dll / WkHtmlToXSharp.Win64.dll not signed and cannot be loaded.

WkHtmlToXSharp.dll is signed, can we also provide option for signed platform specific assemblies?

[shytikov]

Signed assemblies will be loaded to unsigned assemblies with no problem, but unsigned assemblies cannot be loaded to a signed ones.

So it's better to sign all assemblies.