replaced qsort with natural merge sort

changed API of sort algorithms (no further hint for the algorithms used in preparation for the upcomming change from qsort to natural merge sort)

added mkdir for build directory to makefile + added qsort for list and dlist

completed map tests

(0) -30 -10 -4 +4 +10 +30 +100 +300 +1000 tip

mercurial