* MSVC: Fix '/std:c++11' is not a valid compiler option
* MSVC/MINGW: Define 'WIN32_LEAN_AND_MEAN' for the whole project
In some obscure cases 'Windows.h" got includet before that definition, which leaded to compilation warnings+errors
* MSVC: '/arch:SSE' is only available for x86
* MSVC: Fix float conversation
* MSVC/MINGW: use winthreads on Windows
* MSVC: 'USE_CMAKE_CONFIG' might be already definied by CMake build system
* MSVC: Use all available cpu cores for compiling
* Add missing include ctime and use std::time_t
* C++11 patchset 9: move hardcoded init parameters to class definitions
C++11 introduced the possibility to define the default values directly in class definitions, do it on current code
Also remove some unused attributes
* CollisionInfo::bouncy
* collisionMoveResult::collides_xy
* collisionMoveResult::standing_on_unloaded
* Clouds::speed
* More constructor cleanups + some variables removal
* remove only write guiFormSpecMenu::m_old_tooltip
* move header included inside defintions in genericobject.h
* remove some unused since years exception classes
* remove unused & empty debug_stacks_init
* remove unused & empty content_nodemeta_serialize_legacy
* remove forgotten useless bool (bouncy) in collision.cpp code
* Player data to Database
Add player data into databases (SQLite3 & PG only)
PostgreSQL & SQLite: better POO Design for databases
Add --migrate-players argument to server + deprecation warning
* Remove players directory if empty
