having output_folder in settings be false disables output
Merge branch 'master' of https://github.com/olahol/nightwatch into olahol-master

* 'master' of https://github.com/olahol/nightwatch:
  having output_folder in settings be false disables output
added a test for setting output folder and some small refactoring
Merge branch 'olahol-master'

* olahol-master:
  added a test for setting output folder and some small refactoring
  having output_folder in settings be false disables output
Fixed - expected function not called in assertion #173 when result is false/null