Add du to Makefile
Remove du from to-do list
Get basic functionality to work
Getting it to display the correct directory size
Implemented a few more options
Add formatting-related logic
Correctly calculate file size using number of blocks
Adding partial support for formatting time
Fixing time format string
du --version was not implemented
du: add -V and -h
Show all groups
-A option
Finally made work Gn and full
Add P function
Add pretty option
Added g option
Finish
Merge pull request #96 from alan-andrade/id

Id implementation
Removed id from the to-do list and fixed typo
Update for latest Rust and fixed up id for Linux
Unix/BSD head implementation
Merge pull request #97 from Arcterus/master

Update for latest Rust and fixed up id for Linux
Merge pull request #54 from alan-andrade/unix-head

spooky head implementation
groups in progress
Merge pull request #98 from alan-andrade/patch-4

groups in progress