Required Compiler for KDE Frameworks

[Dominik Haumann]

Hi,

on https://community.kde.org/Frameworks/Policies, it says:

  The following minimal compiler versions are supported
  by KDE Frameworks:

  - GCC 4.6
  - Clang 3.1
  - VS2012 (MSVC11)

Is this list really up-do-date?
Afaik, we even require VS2015 these days. What about the others?

Also: Can we use 'override' or are we still bound to Q_DECL_OVERRIDE?

Greetings
Dominik