renamed settings file to nightwatch.json
updated nightwatch version
Updated selenium server version to 2.40.0
adding ability to run a single test via --test cli argument
using nightwatch.json config file
make grunt task fail when the nightwatch tests failed
updated nightwatch version to 0.4.7
Merge pull request #7 from beatfactor/master

Make grunt task fail when the nightwatch tests failed
Fixed version: 0.1.8