Windows Visual Studio + CMake support/guide

[DaemonIB]

The wiki references a Visual Studio guide as TBA. However, it doesn't seem like Vita compiles at all when generating a solution from CMake (VS19 & C++14). If it does compile, could a guide be added, and if not, document it as non-functioning.

[morinim]

At the moment I've removed Visual Studio compatibility.

The source is standard compliant so I'm quite confident a guide can be added. Perhaps minor tweaks are required (I'm working mainly under Linux as well as other known users).

Unfortunately I'm in the midst of a codebase conversion from C++14 to C++17 and I also need to improve various aspect of the dataframe class before considering other tasks.

Anyway Visual Studio compatibility is an important goal and I'll keep this issue open. I think I could setup a virtual machine and experiment with Visual Studio next month.

PS latest C++14 compatible version is v1.1.0.

[morinim]

Things to be done:

• fix some remaining warnings;
• document the build procedure;
• use AppVeyor and integrate Visual Studio.