Implement md5sum (closes #47)
Merge pull request #143 from Arcterus/md5sum

Implement md5sum (closes #47)
md5sum: remove unnecessary variable (thanks @huonw)
Remove uptime from to-do list
md5sum: forgot to add license
Fix OSX crash for uptime
Silence dead code warnings for Constants
Truncate load averages to 2 decimal places
Remove unused import.
Try to read BOOT_TIME from utmpx if /proc/uptime fails.
Merge pull request #144 from Ryman/master

Implement uptime for OSX (probably some other unix too)
du: fix for latest Rust
Merge pull request #145 from Arcterus/fixes

du: fix for latest Rust