init repo
added gitignore
added package json
added first draft
added listening event
added domain task
added cluster domain task
added domain worker
added events task
added listeners count
added data folder
added first draft of stream exercise (readable done)
added writable stream
added streams examples
removed index
ignored logs
added expess dependency
moved tasks to the root
moved old tasks into the root
Merge branch 'master' of https://github.com/wilk/node-certification