-+ fix makefile to compute dependency lists as a side-effect of compilation (-MF)
-+ support integer keys for ht
-+ optimize tracing code, still too much overhead
-+ use NULL instead of a sentinal node in skiplist and list
-+ make the interfaces for all data structures consistent
-+ make list and skiplist use string keys
-+ optimize integer keys
-+ ht_print()
-+ iterators
-+ 32 bit x86 support
-
-memory manangement