Add test to check if the OSError exception is raised.
Add test for jshint to check if the OSError exception is raised.
Add test for csslint to check if the OSError exception is raised.
Fix test that checks if an OSError occurs, the function do not raises an exception, it return false.
Fix test that checks if an OSError occurs in flake8, the function do not raises an exception, it return false.
Fix test that checks if an OSError occurs in jshint, the function do not raises an exception, it return false.
Add test for the jenkins option.
Add flake8 jenkins test. Clean up unused code.
Add jshint jenkins test. Clean up unused code.
Fix subprocess.PIPE limitation on csslint.
Fix bug, when flake8 run forever.
Fix csslint to read file output.
Fix missing pep8 rules.
Fix more pep8 mistakes.
Fix PIPE limitation on jslint.
Use log func for csslint, merge branch changes.