Repair adgroup integration test.

Need to set `adgroup_status` in order for adgroup creation to succeed.

Need to clear history in `remote_create()`, otherwise subsequent
`remote_update()` tries to set the same fields. This especially fails
trying to update adgroup status while it's under review.
Merge pull request #15 from agriffis/self-class

Remove explicit __class__ indirection; self.attr is the same thing.
Merge pull request #16 from agriffis/simpler

No need for list comprehension; shorter equivalent code.
Fix autocomplete endpoint

Summary: Autocomplete endpoint doesn't use act_

Test Plan: Build object and run, should return better results.
Cleaned up failing tests

Summary:
Cleaned up failing tests and cleaned up some of the way we handle
parameters when we instantiate a new object

Test Plan:
Run tests
poke around in repl
Merge pull request #20 from agriffis/py3

Fixes for Python 3 compatibility.
Avoid dict comprehension syntax for Python 2.6 compatibility.
Merge branch 'fixes' into all
Merge branch 'py26' into all
Merge branch 'tox' into all
Merge branch 'travis' into all
Merge branch 'coveralls' into all
Merge branch 'agriffis' into all