fix func doc
set unit to B by default in doc string
Merge pull request #368 from huoxy/master

fix func doc
Fixes #367, this adds in NagiosPerfdataCollector.
Merge pull request #369 from huoxy/set-unit-to-B-by-default-in-doc-string

set unit to B by default in doc string
Merge pull request #372 from lambdafu/master

Do not use abs mode for threaded or forked interval tasks.
PEP8
Doc updates