exception treatment changed

When I try to import pandasql the system prints this error:

```python
from pandasql import sqldf
  File "/opt/python34/lib/python3.4/site-packages/pandasql/__init__.py", line 1, in <module>
    from .sqldf import sqldf
  File "/opt/python34/lib/python3.4/site-packages/pandasql/sqldf.py", line 117
    except Exception, e:
                    ^
SyntaxError: invalid syntax
```

If I remove the ', e', the library works well.

Version INSTALLED: 0.6.1 (latest)