Split up Jtk sources and headers by functional area

wscript

@@ -25,11 +25,11 @@ def build(bld):
     libs = []
     if platform.system() == "Linux":
         defines += ["PLATFORM_LINUX"]
-        defines += ["GUI_X"]
+        defines += ["JTK_X"]
         libs += ["dl", "GL", "X11"]
     elif platform.system() == "Windows":
         defines += ["PLATFORM_WINDOWS"]
-        defines += ["GUI_WINDOWS"]
+        defines += ["JTK_WINDOWS"]
         libs += ["opengl32"]
     defines += ['GLCXX_GL_INCLUDE="gl3w.h"']
     sources = bld.path.ant_glob(["src/**/*.cc", "src/**/*.c", "libs/glcxx/src/glcxx/*"])