Add realtiveFolder property to features

So that we can display a sane hierarchy of the
features if we wanted to create a navigation tree.
Added support for multiple CucumberJS --tags flags.
https://github.com/cucumber/cucumber-js/blob/master/lib/cucumber/cli.js#L51
Merge pull request #24 from nikulkarni/master

Added  changes so that grunt cucumber.js can output live
Merge pull request #22 from opentable/add-relative-folder

Add realtiveFolder property to features
Merge pull request #23 from shaine/master

Added support for multiple CucumberJS --tags flags.
version bump
added require option so that one can specify step_definitions if they are not in default directory