csshint not exist if select css during yo kalatheme

less sure about whether this makes sense and honestly im just playing around with the awesome work you've done here so please let me know whether this is stupid or just doesnt make sense based on what your plans are.

if you `yo kalatheme` with `css` instead of `sass` then the `scss` folder is not copied over which means `.csslintrc.json` does not exist which causes `gulp compile/styles` to fail on that step. 

I'm not sure what `gulp styles` is really suppose to do when you are in `css` mode vs `sass` mode... it may be better to just not include this csslint at all but let me know how all the magic is suppose to work and i'll redo!