This is a set of small usefull utilites & macros


bidirectional_list - simple list with operation of searching, inserting, deleting
B-trees - simple but slowly binary search trees with all main operations
fifo_lifo - simple stack-like queues
simple_list - 1-directional list with functions: add element; delete list
usefull_macros - a lot of different macros & functions
	* safe memory allocation & freeing
	* coloured output on tty & monochromeous on non-tty
	* error/warning/debug macros
	* MMAP files into memory

