status_code requires __ne__ to work in python 2.7.x

[bharath23]

Quoting to the 2.7.x data model [1]

"There are no implied relationships among the comparison operators. The truth of x==y does not imply that x!=y is false. Accordingly, when defining eq(), one should also define ne() so that the operators will behave as expected."

So in python 2.7.x one cannot do the following

browser = Browser()
browser.visit("http://www.google.com")
if browser.status_code != 200:
print("ERROR")

This however will work in python 3.x because the data model says ne will automatically invert the return code of eq

[1] https://docs.python.org/2/reference/datamodel.html

[andrewsmedina]

closed by #645