ln - make hard and symbolic links to files

 TODO: support multiple sources
Support multiple sources
Merge pull request #43 from TacticalGenius/master

Added link
Merge pull request #47 from dailyprogramming/master

ln, okay?
Adding nebukadnezzar's pull request manually.
made Makefile to follow order of the rest
Merge pull request #48 from janbrennen/fuckme

ln's Makefile is now like all the others so it's not special because being special is bad
du
adding cksum and converted du from tabs to spaces
adding cksum and converted du from tabs to spaces
string.h not needed
Merge pull request #49 from 9v5yrfy/master

du
Update README.md
Update README.md
C++ is for losers
added rmdir