Check whether nodes exist before accessing their filters
Fix style in avl_find
Add set files for set configuration
Add set configuration
Use set_cfg in ll_test
Merge pull request #120 from neithernut/fix-style-avl_find

Fix style in avl_find
Merge pull request #122 from neithernut/add-tests-set_cfg

Add tests set cfg
Merge pull request #119 from neithernut/fix-avl-regen_metadata

Fix crashes in regen_metadata
Added testing file for AVL implementation
Added allocation test for avl test
Added test for testing allocation and deleting for AVL
Added test for adding data to the avl tree
Added test for adding and destroying afterwards
Added test for adding multiple elements
Added test for adding multiple and destroying AVL afterwards
Added test for colliding inserts
Added test for finding a single element
Added test for finding multiple elements
[ci skip] Fixup: test_avl_add: The ptrs to the l/r next element should be NULL, actually