Fix CMake MSVS build problem (#366)

* Fix CMake MSVS 2015 boost linking problem
Same errors as here when building vcmi client and server: https://stackoverflow.com/questions/27196312/boost-1-57-0-program-options-msvs-2013-linker-error
Fix based on: https://groups.google.com/forum/#!topic/boost-list/Lhqvoet8N18

* Compile fix for VS 2017.3 due to incompatibility with variadic templates in Boost

https://developercommunity.visualstudio.com/content/problem/69009/compilation-error-on-msvc2015-on-boostbase-from-me.html

CMakeLists.txt

@@ -132,6 +132,7 @@ if(WIN32)
 
 	if(MSVC)
 		add_definitions(-DBOOST_ALL_NO_LIB)
+		add_definitions(-DBOOST_ALL_DYN_LINK)
 		set(Boost_USE_STATIC_LIBS OFF)
 
 		# Don't link with SDLMain

Global.h

@@ -154,7 +154,7 @@ static_assert(sizeof(bool) == 1, "Bool needs to be 1 byte in size.");
 #define BOOST_THREAD_DONT_PROVIDE_THREAD_DESTRUCTOR_CALLS_TERMINATE_IF_JOINABLE 1
 #define BOOST_BIND_NO_PLACEHOLDERS
 
-#if defined(_MSC_VER) && (_MSC_VER == 1900 || _MSC_VER == 1910)
+#if defined(_MSC_VER) && (_MSC_VER == 1900 || _MSC_VER == 1910 || _MSC_VER == 1911)
 #define BOOST_NO_CXX11_VARIADIC_TEMPLATES //Variadic templates are buggy in VS2015 and VS2017, so turn this off to avoid compile errors
 #endif