Added neighbor_fill to top level import.

Author: Eli

vtools/__init__.py

@@ -36,3 +36,4 @@
 from vtools.functions.interpolate import *
 from vtools.functions.lag_cross_correlation import *
 from vtools.functions.envelope import *
+from vtools.functions.neighbor_fill import *

vtools/functions/neighbor_fill.py

@@ -50,6 +50,8 @@
 import numpy as np
 import pandas as pd
 
+__all__ = ["fill_from_neighbor", "FillResult"]
+
 # Optional heavy dependencies
 try:
     import statsmodels.api as sm