Unexpected results when filtering with .isin (some fields contain python datastructures)
#### Code Sample, a copy-pastable example if possible

```python
import pandas as pd

data = [
    {'id': 1, 'content': [{'values': 3}]},
    {'id': 2, 'content': u'whats going on'},
    {'id': 3, 'content': u'whaaaaaaaaat'},
    {'id': 4, 'content': [{'values': 4}]}
]

if __name__ == '__main__':
    df = pd.DataFrame.from_dict(data)
    v = [u'whats going on', u'whaaaaaat']
    print df[df.content.isin(v)]
    v = [u'whats going on', u'what']
    print df[df.content.isin(v)]
```
#### Problem description

The first print statement executes sucessfully, filtering to the single row `'id': 2, 'content': u'whats going on'`, however the second filter throws an error even though the only difference is the length of one of the elements in the list `v`.

Output for the code snippet above:
```
          content  id
1  whats going on   2
/home/attila/digital/env/local/lib/python2.7/site-packages/pandas/core/indexes/range.py:473: RuntimeWarning: tp_compare didn't return -1 or -2 for exception
  return max(0, -(-(self._stop - self._start) // self._step))
Traceback (most recent call last):
  File "test_pandas.py", line 15, in <module>
    print df[df.content.isin(v)]
  File "/home/attila/digital/env/local/lib/python2.7/site-packages/pandas/core/series.py", line 2804, in isin
    return self._constructor(result, index=self.index).__finalize__(self)
  File "/home/attila/digital/env/local/lib/python2.7/site-packages/pandas/core/series.py", line 264, in __init__
    raise_cast_failure=True)
  File "/home/attila/digital/env/local/lib/python2.7/site-packages/pandas/core/series.py", line 3269, in _sanitize_array
    if len(subarr) != len(index) and len(subarr) == 1:
  File "/home/attila/digital/env/local/lib/python2.7/site-packages/pandas/core/indexes/range.py", line 473, in __len__
    return max(0, -(-(self._stop - self._start) // self._step))
TypeError: unhashable type: 'list'
```
<details>
INSTALLED VERSIONS
------------------
commit: None
python: 2.7.12.final.0
python-bits: 64
OS: Linux
OS-release: 4.13.0-37-generic
machine: x86_64
processor: x86_64
byteorder: little
LC_ALL: None
LANG: en_GB.UTF-8
LOCALE: None.None

pandas: 0.22.0
pytest: 2.9.2
pip: 9.0.1
setuptools: 36.4.0
Cython: None
numpy: 1.14.2
scipy: 0.18.1
pyarrow: None
xarray: None
IPython: None
sphinx: None
patsy: None
dateutil: 2.6.1
pytz: 2017.2
blosc: None
bottleneck: None
tables: None
numexpr: None
feather: None
matplotlib: 2.1.2
openpyxl: None
xlrd: None
xlwt: None
xlsxwriter: None
lxml: None
bs4: None
html5lib: None
sqlalchemy: 1.0.5
pymysql: None
psycopg2: 2.6.1 (dt dec pq3 ext lo64)
jinja2: 2.9.6
s3fs: None
fastparquet: None
pandas_gbq: None
pandas_datareader: None
</details>
