Enable to assign list.

[ueshin]

Enables to assign list to DataFrame.

>>> kdf = ks.DataFrame({"A": [0, 2, 4], "B": [1, 3, 5], "C": [6, 7, 8]}, index=[10, 11, 12])
>>> kdf['D'] = [9, 10, 11]
>>> kdf
    A  B  C   D
10  0  1  6   9
11  2  3  7  10
12  4  5  8  11

Resolves #1403.

[itholic]

nice :)