Merge pull request #12 from huoxy/necklet:master

add uninstall()
Merge pull request #13 from huoxy/necklet:master

a-big-refactor: use libcgroup finallly, wtf
Merge branch 'master' of https://github.com/huoxy/necklet
fix bug
add docs
add docs
fix necklet.conf.example
fix readme
rm unused
rm unknown kw