Modified DataFrame.add_column() so that numpy arrays can be dataframe elements.
Modified DataFrame.add_column() so that numpy arrays can be dataframe
elements.

	modified:   packages/vaex-core/vaex/dataframe.py

maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex