Made the timestamper use timeGetTime() instead of GetTickCount() on windows

since timeGetTime() is more accurate.

dlib/CMakeLists.txt

@@ -136,9 +136,9 @@ if (NOT TARGET dlib)
       # we want to link to the right stuff depending on our platform.  
       if (WIN32 AND NOT CYGWIN) ###############################################################################
          if (DLIB_NO_GUI_SUPPORT)
-            set (dlib_needed_libraries ws2_32)
+            set (dlib_needed_libraries ws2_32 winmm)
          else()
-            set (dlib_needed_libraries ws2_32 comctl32 gdi32 imm32)
+            set (dlib_needed_libraries ws2_32 winmm comctl32 gdi32 imm32)
          endif()
       elseif(APPLE) ############################################################################
          find_library(pthreadlib pthread)

dlib/misc_api/misc_api_kernel_1.cpp

@@ -13,6 +13,11 @@
 #include "../windows_magic.h"
 #include <windows.h>
 
+// tell visual studio to link to the library needed to call timeGetTime() 
+#ifdef _MSC_VER
+#pragma comment (lib, "winmm.lib")
+#endif
+
 #ifdef __BORLANDC__
 // Apparently the borland compiler doesn't define this.
 #define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
@@ -89,7 +94,7 @@ namespace dlib
     get_timestamp (
     ) const
     {
-        unsigned long temp = GetTickCount();
+        unsigned long temp = timeGetTime();
         if (temp >= last_time)
         {            
             last_time = temp;