Fix closes #150
Updated return codes from jshint

jshint return codes changed after version 1.0, more information here:

https://github.com/jshint/jshint/issues/916#issuecomment-14808738
Merge pull request #156 from camilonova/patch-2

Updated return codes from jshint
Merge pull request #152 from camilonova/patch-1

Fix closes #150
Merge remote-tracking branch 'kmmbvnr/master'

Conflicts:
	django_jenkins/tasks/run_jshint.py