Fix iteration macro in ll
Add inclusion to pull in r_set_cfg
Remove malicious commata from set.h
Remove malicious qualifiers
Add r_set_cfg to avl_destroy
Add r_set_cfg parameter to avl_add
Add r_set_cfg parameter to avl_del
Move avl_find internals into function
Redefine function avl_find
Adapt the interface of avl_del
Merge pull request #106 from neithernut/mod-avl_interface

Mod avl interface
Fix: Return hash of element after insertion
Fix: The hash function gets void* and returns rs_hash
The hashtable does not need to know the datasize
We need a compare element and the cfg as well when finding elements
We return the found element or NULL
Fix: ht_del() gets hash, cmp element, cfg and returns the element which was deleted
Fix: ht_insert() needs the cfg as well
Fix: We should include the set header here as well