windows: Add ntdll and bind to more process listing functions.
tools.ps.windows: Implement ps. for Windows!
windows.ntdll: Make this Windows-only.
unix.linux.proc: Pad tail with f for cpu-info. Fixes #877.
rosetta-code.josephus-problem: adding solution for josephus problem.
math.combinatorics: faster by using hints for the array common case.
rosetta-code.josephus-problem: change to use josephus-2 if k=2.