Merge pull request #148 from Arcterus/master

Update for latest Rust
implement uname
Merge pull request #150 from joaoxsouls/master

implement uname (closes #149)
update uname: use push_str instead of + for appending
Merge pull request #152 from joaoxsouls/master

update uname: use push_str instead of + for appending
implement kill
Merge pull request #153 from Fiedzia/kill-ng

implement kill
implement hostid
pass params directly to show_error macro
Merge pull request #156 from Fiedzia/hostid

implement hostid
Merge pull request #157 from Fiedzia/kill-cleanup

kill: pass params directly to show_error macro
Fixed most issues caused by libc being moved from std to it's own crate.

I just did a quick pass and fixed a majority of the simple issues but
there are still some problems with the following utils:
  id
  md5sum
  tee
  uptime
  users
  whoami
Accidentally removed an exclamation for crate_id in echo. Put it back.
Merge pull request #158 from PeteJodo/master

Fixed most issues caused by libc being moved from std to it's own crate.
Update base64 to latest rust
Merge pull request #160 from jordyd/master

Update base64 to latest rust
Fix everything but md5sum (blocked on rust-crypto) for latest Rust