changelog
    
    
    - Mon, 18 May 2015 19:12:32 +0200
 
    - by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 18 May 2015 19:12:32 +0200] rev 198
 
    - added test for ucx_avl_put
 
    - Mon, 18 May 2015 18:42:45 +0200
 
    - by Mike Becker <universe@uap-core.de> [Mon, 18 May 2015 18:42:45 +0200] rev 197
 
    - fuck -Wparentheses
 
    - Mon, 18 May 2015 18:39:19 +0200
 
    - by Mike Becker <universe@uap-core.de> [Mon, 18 May 2015 18:39:19 +0200] rev 196
 
    - added free() to AVL tree implementation + use UcxAllocator
 
    - Mon, 18 May 2015 12:54:18 +0200
 
    - by Mike Becker <universe@uap-core.de> [Mon, 18 May 2015 12:54:18 +0200] rev 195
 
    - added AVL tree implementation - TODO: free memory + test cases
 
    - Sun, 17 May 2015 18:32:41 +0200
 
    - by Mike Becker <universe@uap-core.de> [Sun, 17 May 2015 18:32:41 +0200] rev 194
 
    - finalized AVL tree interface + added implementation skeleton + fixed ucx_ptrcmp()
 
    - Sun, 17 May 2015 17:59:07 +0200
 
    - by Mike Becker <universe@uap-core.de> [Sun, 17 May 2015 17:59:07 +0200] rev 193
 
    - defined AVL tree functional interface
 
    - Sun, 17 May 2015 17:31:32 +0200
 
    - by Mike Becker <universe@uap-core.de> [Sun, 17 May 2015 17:31:32 +0200] rev 192
 
    - updated copyright notice + added files for upcoming AVL tree implementation