- Disable annoying VS warnings

- Option to enable multiprocessor build on VS
- Move all options to CMake:
   - Unicode
   - Platform specs

CMakeLists.txt

@@ -4,7 +4,56 @@
 project(nana)
 cmake_minimum_required(VERSION 2.8)
 
-#find dependencies
+
+#Select platform automatically
+if(WIN32)
+	add_definitions(-DNANA_WINDOWS)
+	add_definitions(-DPLATFORM_SPEC_HPP=<nana/detail/win32/platform_spec.hpp>)
+
+	#Test if it is MINGW
+	if(MINGW)
+		add_definitions(-DNANA_MINGW)
+		add_definitions(-DSTD_CODECVT_NOT_SUPPORTED)
+		option(NANA_THREAD_NOT_SUPPORTED "Use this flag if MinGW version is older than 4.8.1" ON)
+		if(NANA_THREAD_NOT_SUPPORTED)
+			add_definitions(-DSTD_THREAD_NOT_SUPPORTED)
+		endif()
+	endif()
+endif()
+if(UNIX)
+	add_definitions(-DNANA_LINUX)
+	add_definitions(-DNANA_X11)
+	add_definitions(-DPLATFORM_SPEC_HPP=<nana/detail/linux_X11/platform_spec.hpp>)
+	add_definitions(-DSTD_CODECVT_NOT_SUPPORTED)
+endif()
+
+
+#Global MSVC definitions
+if(WIN32)
+	if(MSVC)
+		option(WIN32_USE_MP "Set to ON to build nana with the /MP option (Visual Studio 2005 and above)." ON)
+		if(WIN32_USE_MP)
+			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
+		endif()
+		
+		# More MSVC specific compilation flags
+		add_definitions(-D_SCL_SECURE_NO_WARNINGS)
+		add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
+	endif(MSVC)
+endif(WIN32)
+
+
+#Unicode
+option(NANA_UNICODE "Use Unicode Character Set" ON)
+if(NANA_UNICODE)
+	add_definitions(-DNANA_UNICODE)
+	if(WIN32)
+		add_definitions(-DUNICODE -D_UNICODE)
+	endif()
+endif()
+
+
+#Find PNG
 if(UNIX)
 	find_package(Freetype)
 	if (FREETYPE_FOUND)
@@ -29,7 +78,7 @@ endif()
 
 
 
-#copy our new config.hpp (with removed PNG defines)
+#Copy our new config.hpp (with removed defines)
 execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_SOURCE_DIR}/build/cmake/config.hpp ${CMAKE_SOURCE_DIR}/include/nana/)