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.
This code is an example of [Schlemiel-style](https://en.wikipedia.org/wiki/Joel_Spolsky#Schlemiel_the_Painter.27s_algorithm) concatenation. It is better to use formatting and structure it properly:
```python
qr = qrcode.make(
    "bitcoin:%s?amount=%s&message=%s" % (address, total, qr_url)
)
```