to_sql throws latin-1 encoding error even though everything seems encoded in utf-8
I want to upload a file from csv to mysql with the following commands

```
 df = pandas.read_csv('test.csv', encoding = 'utf-8')
engine = sqlalchemy.create(<Mysql-Connection-URI>, encoding = 'utf-8')
df.to_sql('testtable', con = engine)
```

mysql has utf-8 as global encoding. If I upload the file manually to the database it goes without problems. 

using to_sql throws the following errror: 
`UnicodeEncodeError: 'latin-1' codec can't encode character '\u015e'`etc...

Any ideas, where Latin-1 becomes part of the games and how this could be fixed? Thanks for any advice!
