UnicodeDecodeError: 'utf-8' codec can't decode byte 0xbb with read_excel function
```python
import pandas as pd

data = pd.read_excel(open("2016-07-12_Zuwendungsbericht_2015_OpenData.xlsx"), sheetname="Zuwendungsbericht", encoding="utf-8")
```
I'm getting this error when I try to read this excel file: http://transparenz.bremen.de/sixcms/media.php/13/2016-07-12_Zuwendungsbericht_2015_OpenData.xlsx .

`UnicodeDecodeError: 'utf-8' codec can't decode byte 0xbb in position 14: invalid start byte`

<details>
INSTALLED VERSIONS
------------------
commit: None
python: 3.6.0.final.0
python-bits: 64
OS: Linux
OS-release: 4.4.0-57-generic
machine: x86_64
processor: x86_64
byteorder: little
LC_ALL: None
LANG: de_DE.UTF-8
LOCALE: de_DE.UTF-8

pandas: 0.19.2
nose: None
pip: 9.0.1
setuptools: 28.8.0
Cython: None
numpy: 1.11.3
scipy: None
statsmodels: None
xarray: None
IPython: None
sphinx: None
patsy: None
dateutil: 2.6.0
pytz: 2016.10
blosc: None
bottleneck: None
tables: None
numexpr: None
matplotlib: None
openpyxl: None
xlrd: 1.0.0
xlwt: None
xlsxwriter: None
lxml: None
bs4: None
html5lib: None
httplib2: None
apiclient: None
sqlalchemy: None
pymysql: None
psycopg2: None
jinja2: None
boto: None
pandas_datareader: None
None
</details>
