Make imports faster on the Mac, by
- Remembering whether sys.path components refer to files or folders,
- Using mac-specific code to check for file existence, in stead of trying
  to fopen() each possible file.

These mods need an accompanying mod to import.c.
diff --git a/Mac/Include/macglue.h b/Mac/Include/macglue.h
index 0f53a0c..4d52fe6 100644
--- a/Mac/Include/macglue.h
+++ b/Mac/Include/macglue.h
@@ -81,8 +81,9 @@
 void PyMac_InitMenuBar(void);			/* Setup menu bar as we want it */
 void PyMac_RestoreMenuBar(void);		/* Restore menu bar for ease of exiting */
 
-int PyMac_FindResourceModule(char *, char *); /* Test for 'PYC ' resource in a file */
+int PyMac_FindResourceModule(PyStringObject *, char *, char *); /* Test for 'PYC ' resource in a file */
 PyObject * PyMac_LoadResourceModule(char *, char *); /* Load 'PYC ' resource from file */
+struct filedescr *PyMac_FindModuleExtension(char *, int *, char *); /* Look for module in single folder */
 
 int PyMac_GetDirectory(FSSpec *dirfss, char *prompt);		/* Ask user for a directory */
 void PyMac_PromptGetFile(short numTypes, ConstSFTypeListPtr typeList,