So that Transaction object behavior is exercised, uses the Transaction
object in performance module tests instead of ndict.
Also, adds fields to the __init__ of Transaction, to make the
definition of the object more well defined.
Instead of a loosely defined object for Order, explicitly
defines the parameters and corresponding members.
Clearing the way for adding more members to the Order object.
The latest flake8 release in now 1.5, which pulls in pep8: 1.3.4a0
The upgrade pep8 has changes to what it picks up as lint.
Making code base compatible, so that new devs can install pep8
from PyPI and not have friction over the version difference.
Currently using these ignores in the config file:
```
[pep8]
ignore = E124,E125,E126
```
Ignoring these since they are difficult to squash while maintaining
an 80 char line length, and appear spurious.
Should address later.
Updates Travis config, README, and pip requirements to reflect change.
Eddie Hebert