add a command line option to produce errors from warnings
add a command line option to produce errors from warnings

jonashaag/jedi,WoLpH/jedi,flurischt/jedi,jonashaag/jedi,dwillmer/jedi,flurischt/jedi,tjwei/jedi,WoLpH/jedi,mfussenegger/jedi,mfussenegger/jedi,tjwei/jedi,dwillmer/jedi