TST start on testing consistent class weights
ENH nu-SVC doesn't support class_weights
FIX liblinear class weight in binary case, robust testing.
cosmit whitespace
DOC add comment in liblinear
TST  better test for class weights (that actually tests something)
ENH test automatic setting of class weights in common test
TST skip RidgeClassifier in class weight test for the moment
DOC added fix to whatsnew.
FIX don't test auto in ridge classifier as it is not supported currently
FIX tests for auto class weights
DOC more concrete whatsnew
FIX skip tests for naive bayes for the moment.