Export *KEY operators in OPLIST for array, dict, B+tree

m-bptree.h

@@ -80,6 +80,10 @@
    CLEAN(M_C(name,_clean)),						\
    GET_MIN(M_C(name,_min)),						\
    GET_MAX(M_C(name,_max)),						\
+   SET_KEY(M_C(name, _set_at)),                                         \
+   GET_KEY(M_C(name, _get)),                                            \
+   /*GET_SET_KEY(M_C(name, _get_at))*/,                                 \
+   ERASE_KEY(M_C(name, _erase)),                                        \
    M_IF_METHOD_BOTH(GET_STR, key_oplist, value_oplist)(GET_STR(M_C(name, _get_str)),), \
    M_IF_METHOD_BOTH(PARSE_STR, key_oplist, value_oplist)(PARSE_STR(M_C(name, _parse_str)),), \
    M_IF_METHOD_BOTH(OUT_STR, key_oplist, value_oplist)(OUT_STR(M_C(name, _out_str)),), \