Static build for Windows 64bit and 32bit

[aliascash]

Produce a compiled version of XSPEC which has been statically linked against all libraries so as to produce a single executable file.

[shbli]

@spectrecoin Is this really for 1.4.0? or can we do it for 1.4.1? or another new version.

I think this is not a really blocking feature for 1.4.0 and it will be more time consuming to look at as well.

We can defiantly also let someone else help us work on this on the side. Totally not related to our project.

A good start to read is http://amin-ahmadi.com/2016/09/22/how-to-build-qt-5-7-statically-using-msvc14-microsoft-visual-studio-2015/

You can compile all the Qt libs (Except QtWebEngine, this have to be done separately)

I was able to compile the whole libs pretty easily. we just need to be able to compile QtWebEngine statically.

Keep in mind we talking 64 bit for now. support for 32 bit can come later.