Merge branch 'master' of /Users/jan/Documents/Git/categorical-encoding with conflicts.

Author: janmotl

category_encoders/leave_one_out.py

@@ -80,7 +80,7 @@ def __init__(self, verbose=0, cols=None, drop_invariant=False, return_df=True, i
         self.drop_invariant = drop_invariant
         self.drop_cols = []
         self.verbose = verbose
-        self.use_default_cols = cols is None  # important when we call fit() repeatedly
+        self.use_default_cols = cols is None # if True, even a repeated call of fit() will select string columns from X
         self.cols = cols
         self._dim = None
         self.mapping = None