Add ltalloc.

experimental/ltalloc.h

@@ -0,0 +1,14 @@
+#include <stdlib.h>  /*a more portable size_t definition than stddef.h itself*/
+#ifdef __cplusplus
+extern "C" {
+#endif
+void*  ltmalloc(size_t);
+void   ltfree(void*);
+void*  ltrealloc( void *, size_t );
+void*  ltcalloc( size_t, size_t );
+void*  ltmemalign( size_t, size_t );
+void   ltsqueeze(size_t pad); /*return memory to system (see README.md)*/
+size_t ltmsize(void*);
+#ifdef __cplusplus
+}
+#endif