Sirupsen/progressrus — pull request #3 by kristianpd (2013-12-11 12:25:19+00:00)
Title: get -> find, find_all and infinity fix for eta

* Rename `Store#get` to `Store#find`
* Add `Store#find_all` to retrieve all `Progresser`s for a scope
* Prevents `Tick#eta` from returning `Infinity` if the `count` is `0`.

@Sirupsen