[bug 990527] Rename field verified_recruitment to verify_activity in reports.
[fix bug 990527] Fix wrong message when a user invalidates a report.

* Minor PEP8 fixes.
Merge pull request #688 from akatsoulas/990527

[fix bug 990527] Fix wrong message when a user invalidates a report.
Update south to version 0.8.1.

A bug exists in versions >0.8.1 where fixture loading does not respect
defined "pk"s which results in multiple tests failing. This version is
good enough for us now, as what we need is the --update command which is
available.