Switch to CMake for builds and reorganize the source directories.

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.14)
+
+# This policy is needed so that we can set the MSVC_RUNTIME to statically linked
+# i.e. set_property(TARGET 4klang PROPERTY MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
+cmake_policy(SET CMP0091 NEW) 
+
+project(4klang
+    VERSION 3.3.2
+    DESCRIPTION "A modular synthesizer for 4k/8k intros"
+    LANGUAGES C CXX)
+
+# Only do these if this is the main project, and not if it is included through add_subdirectory
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
+    # Let's ensure -std=c++xx instead of -std=g++xx
+    set(CMAKE_CXX_EXTENSIONS OFF)
+
+    # Let's nicely support folders in IDE's
+    set_property(GLOBAL PROPERTY USE_FOLDERS ON)
+
+    # Testing only available if this is the main app
+    # Note this needs to be done in the main CMakeLists
+    # since it calls enable_testing, which must be in the
+    # main CMakeLists.
+    include(CTest)
+endif()
+
+enable_language(ASM_NASM)
+
+# The normal NASM compile object does not include <DEFINES>
+# By putting them there, we can pass the same compile definitions to C and ASM
+set(CMAKE_ASM_NASM_COMPILE_OBJECT "<CMAKE_ASM_NASM_COMPILER> <INCLUDES> <DEFINES> <FLAGS> -f ${CMAKE_ASM_NASM_OBJECT_FORMAT} -o <OBJECT> <SOURCE>")
+
+# The compiled VSTi is here
+add_subdirectory(src)
+
+# We should put examples here
+# add_subdirectory(examples)