PEP8 openbazaar.py through ws.py

PEP8 clean up 3 of 3.  Orders.py has some very deeply nested dictionaries which necessitate long lines.  This situation may suggest minor future refactoring of the affected methods.
Use formatting and lazy logging:
```python
self.log.error(
    "Could not shutdown bitmessage_api's ServerProxy. %s",
    e.message)
```