[discussion] progress indicators

Continuing discussion with @othiym23 from https://github.com/npm/npm/issues/5340#issuecomment-51248281 . I've extracted apt-get-like [progress indicator](https://camo.githubusercontent.com/0c24dfeab3f1ab2c7a854fd3b7e0c1f7db948d3e/68747470733a2f2f7261772e6769746875622e636f6d2f726c6964776b612f7961706d2f6d61737465722f6368616e6765732f696d616765732f6d61696e2e706e67) I was referring to earlier into a [separate module](https://github.com/rlidwka/yapm-progress). 

It's probably not ready to be merged as is, but I suggest to discuss whether it is an improvement over spinner-char or not.

Personally, I'd prefer the npm output to be exactly like `apt-get` is now, with 1 line per every installed package and some kind of progress indicator at the bottom. Why did loglevel change from "http" anyway?