This supersedes #40.
And makes use of the treq.response._Response.
Add requests style `history` attribute to response.
Fix weirdness in other test.
Only want to build the history when we have actually got a response.
Fix test broken by change to addCallback. Order results properly.
Merge branch 'master' into add-response-history
Move history() to the Treq Response API and don't calculate it until …
history() raises NotImplementedError on older twisted versions.
comma comma comma comma comma chameleon.
Document redirects some.