adding freetype dll for win32

src/dlangui/graphics/ftfonts.d

@@ -30,5 +30,10 @@ class FreeTypeFontManager : FontManager {
 	override void cleanup() {
     }
 
+    /// register freetype font by filename - optinally font properties can be passed if known (e.g. from libfontconfig).
+    bool registerFont(string filename, FontFamily family = FontFamily.SansSerif, string face = null, bool italic = false, int weight = 0) {
+        return false;
+    }
+
 	~this() {}
 }

src/dlangui/platforms/windows/winapp.d

@@ -417,6 +417,10 @@ int myWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int
 	Win32FontManager fontMan = new Win32FontManager();
 	FontManager.instance = fontMan;
 
+    /// testing freetype font manager
+    import dlangui.graphics.ftfonts;
+    FreeTypeFontManager ftfontMan = new FreeTypeFontManager();
+
     version (USE_OPENGL) {
         import derelict.opengl3.gl3;
         DerelictGL3.load();