Drop Visual Studio 2013

[Itms]

This is mainly a ticket to remind myself of some things.

We now support Visual Studio 2015 in a stable way. 2013 support should be dropped because of its limited modern C++ support, and because it cannot be installed easily anymore (download sources are difficult to find).

Prior to dropping:

• Make Jenkins build with 2015 instead of 2013
• Commit glooxwrapper
• Watch for bugs

Dropping:

• Update premake scripts and update-workspaces.bat

After dropping:

• Update wiki:CppSupport
  • Fix TODO in ScriptInterface.h​ ScriptVal.h and ComponentManager.h​ (grep for Rvalue references v3.0)
  • Test and fix NativeWrapperDefns.h#L49
  • Will code improvements be made possible?
• Mass rebuild libraries (and use the opportunity to upgrade them)

To be considered:

• Add support for 2017 and 2019. Easy to do in premake, but depends on whether whatever version of SpiderMonkey we use can be built with those.

[Itms]

Found another TODO.