fix VFS bug preventing directories from being created:

- vfs_lookup: currentPath was of wrong type; simplified and fix create
logic
- archive_zip: fix: correctly handle filenames with /
- vfs: remove workaround for above bug
- io: temporarily disable block caching (works around problem with zip
file created by 7z)

add and use new wdbg_heap module (WIP)
remove mmgr

This was SVN commit r5571.

source/test_setup.cpp

@@ -9,6 +9,10 @@
 
 #include <cxxtest/GlobalFixture.h>
 
+#if OS_WIN
+#include "lib/sysdep/win/wdbg_heap.h"
+#endif
+
 class LeakReporter : public CxxTest::GlobalFixture
 {
 	virtual bool tearDownWorld()
@@ -16,19 +20,9 @@ class LeakReporter : public CxxTest::GlobalFixture
 		// Enable leak reporting on exit.
 		// (This is done in tearDownWorld so that it doesn't report 'leaks'
 		// if the program is aborted before finishing cleanly.)
-
-#if HAVE_VC_DEBUG_ALLOC
-		int flags = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
-		flags |= _CRTDBG_LEAK_CHECK_DF; // check for memory leaks
-		flags |= _CRTDBG_ALLOC_MEM_DF; // also check allocs using the non-debug version of new
-		_CrtSetDbgFlag(flags);
-
-		// Send output to stdout as well as the debug window, so it works during
-		// the normal build process as well as when debugging the test .exe
-		_CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
-		_CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDOUT);
+#if OS_WIN
+		wdbg_heap_Enable(true);
 #endif
-
 		return true;
 	}